v4.0.x - Remove legacy python and add python3.8 support (#499)

* Drop support for legacy Python 2.7 * Upgrade Python syntax with pyupgrade --py3-plus * Trim testing matrix to remove python2 * re-enable python3.8 in travis as tests that are not allowed to fail * Remove some six * The future is now * Remove Python 2 imports * Add back example, but change py27 to py36 * Remove redundant compat.py * Blacken * Credit hugovk in changelog WIP Updating Sphinx Docs and AutoDoc * Fix AutoDoc and update Sphinx theme to python_doc_theme * Fix #420, autodoc even undocumented (docstring-less) method signatures * Doc theme 'nature'. Add global TOC to doc sidebar * Comment last reference to package six * Changelog is now a consistent format * Yet another documentation fix for links and title hierarchy * Start work on new SVG logo test SVG in README trying to test new SVG logo in README Apply centering Apply readme logo centering Trying to align image Trying random shit trying align right add emoji Large logo has higher priority Change title hierarchy Actually use a H1 Try again try and organise badges revert link back to point at master * updated new take on VCR logo as SVG code * Testing modern logo in docs * Add sanitize for rendering SVG * Switch to alabaster theme * Update vcrpy logo (#503) * Add credit for V4 logo changes. * Add rewind and play animation * Add svg into ReadTheDocs static assets so that it can be hosted so the animations work. * Need to embedd the SVG for ReadTheDocs somewhere so I can get the link to later embed in the README Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com> Co-authored-by: Sean Bailey <sean@seanbailey.io>
2025-12-08 16:53:23 +00:00 · 2019-12-20 11:45:07 +11:00
parent 41ca5750e7
commit 4a8e80ee3e
57 changed files with 501 additions and 453 deletions
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,23 +17,11 @@ matrix:
    # Only run lint on a single 3.x
    - env: TOX_SUFFIX="lint"
      python: "3.7"
  allow_failures:
    - env: TOX_SUFFIX="aiohttp"
      python: "pypy3"
    - python: "3.8-dev"
  exclude:
    # Exclude aiohttp support
    - env: TOX_SUFFIX="aiohttp"
      python: "2.7"
    - env: TOX_SUFFIX="aiohttp"
      python: "pypy"
 python:
  - "2.7"
  - "3.5"
  - "3.6"
  - "3.7"
-  - "3.8-dev"
+  - "3.8"
  - "pypy"
  - "pypy3"
 install:
  - pip install tox-travis codecov
--- a/README.rst
+++ b/README.rst
@@ -1,10 +1,17 @@
 #########
 VCR.py 📼
 #########
 |PyPI| |Python versions| |Build Status| |CodeCov| |Gitter| |CodeStyleBlack|
-VCR.py
+----
 ======
 .. image:: https://raw.github.com/kevin1024/vcrpy/master/vcr.png
-   :alt: vcr.py
+   :alt: vcr.py logo
   :align: right
 This is a Python version of `Ruby's VCR
 library <https://github.com/vcr/vcr>`__.
@@ -42,7 +49,7 @@ all HTTP interactions, which will update them to correspond to the new
 API.
 License
-=======
+-------
 This library uses the MIT license. See `LICENSE.txt <LICENSE.txt>`__ for
 more details
--- a/docs/_static/vcr.png
+++ b/docs/_static/vcr.png
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+++ b/docs/_static/vcr.svg
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--- a/docs/advanced.rst
+++ b/docs/advanced.rst
@@ -130,7 +130,7 @@ Finally, register your method with VCR to use your new request matcher.
 Register your own cassette persister
 ------------------------------------
-Create your own persistence class, see the :ref:`persister_example`.
+Create your own persistence class, see the example below:
 Your custom persister must implement both ``load_cassette`` and ``save_cassette``
 methods.  The ``load_cassette`` method must return a deserialized cassette or raise
@@ -143,7 +143,7 @@ Once the persister class is defined, register with VCR like so...
    import vcr
    my_vcr = vcr.VCR()
-    class CustomerPersister(object):
+    class CustomerPersister:
        # implement Persister methods...
    my_vcr.register_persister(CustomPersister)
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -7,14 +7,21 @@ For a full list of triaged issues, bugs and PRs and what release they are target
 All help in providing PRs to close out bug issues is appreciated. Even if that is providing a repo that fully replicates issues. We have very generous contributors that have added these to bug issues which meant another contributor picked up the bug and closed it out.
-  4.0.0 (UNRELEASED)
+-  UNRELEASED
-  - Remove Python2 support
+    - ...
-  - Add Python 3.8 TravisCI support
+
 -  4.0.0
    - Remove Python2 support (@hugovk)
    - Add Python 3.8 TravisCI support (@neozenith)
    - Updated the logo to a modern material design (@sean0x42)
 -  3.0.0
    - This release is a breaking change as it changes how aiohttp follows redirects and your cassettes may need to be re-recorded with this update.
    - Fix multiple requests being replayed per single request in aiohttp stub #495 (@nickdirienzo)
    - Add support for `request_info` on mocked responses in aiohttp stub #495 (@nickdirienzo)
    - doc: fixed variable name (a -> cass) in an example for rewind #492 (@yarikoptic)
 -  2.1.1 
    - Format code with black (@neozenith)
    - Use latest pypy3 in Travis (@hugovk)
@@ -23,188 +30,199 @@ All help in providing PRs to close out bug issues is appreciated. Even if that i
    - Add `pytest-recording` to the documentation as an alternative Pytest plugin (@Stranger6667)
    - Fix yarl and python3.5 version issue (@neozenith)
    - Fix header matcher for boto3 - fixes #474 (@simahawk)
-  2.1.0 - Add a `rewind` method to reset a cassette (thanks @khamidou)
+-  2.1.0 
-   New error message with more details on why the cassette failed to play a request (thanks @arthurHamon2, @neozenith)
+    - Add a `rewind` method to reset a cassette (thanks @khamidou)
-   Handle connect tunnel URI (thanks @jeking3)
+    - New error message with more details on why the cassette failed to play a request (thanks @arthurHamon2, @neozenith)
-   Add code coverage to the project (thanks @neozenith)
+    - Handle connect tunnel URI (thanks @jeking3)
-   Drop support to python 3.4
+    - Add code coverage to the project (thanks @neozenith)
-   Add deprecation warning on python 2.7, next major release will drop python 2.7 support
+    - Drop support to python 3.4
-   Fix build problems on requests tests (thanks to @dunossauro)
+    - Add deprecation warning on python 2.7, next major release will drop python 2.7 support
-   Fix matching on 'body' failing when Unicode symbols are present in them (thanks @valgur)
+    - Fix build problems on requests tests (thanks to @dunossauro)
-   Fix bugs on aiohttp integration (thanks @graingert, @steinnes, @stj, @lamenezes, @lmazuel)
+    - Fix matching on 'body' failing when Unicode symbols are present in them (thanks @valgur)
-   Fix Biopython incompatibility (thanks @rishab121)
+    - Fix bugs on aiohttp integration (thanks @graingert, @steinnes, @stj, @lamenezes, @lmazuel)
-   Fix Boto3 integration (thanks @1oglop1, @arthurHamon2)
+    - Fix Biopython incompatibility (thanks @rishab121)
-  2.0.1 - Fix bug when using vcrpy with python 3.4
+    - Fix Boto3 integration (thanks @1oglop1, @arthurHamon2)
-  2.0.0 - Support python 3.7 (fix httplib2 and urllib2, thanks @felixonmars)
+-  2.0.1 
-   [#356] Fixes `before_record_response` so the original response isn't changed (thanks @kgraves)
+    - Fix bug when using vcrpy with python 3.4
-   Fix requests stub when using proxy (thanks @samuelfekete @daneoshiga)
+-  2.0.0 
-   (only for aiohttp stub) Drop support to python 3.4 asyncio.coroutine (aiohttp doesn't support python it anymore)
+    - Support python 3.7 (fix httplib2 and urllib2, thanks @felixonmars)
-   Fix aiohttp stub to work with aiohttp client (thanks @stj)
+    - [#356] Fixes `before_record_response` so the original response isn't changed (thanks @kgraves)
-   Fix aiohttp stub to accept content type passed
+    - Fix requests stub when using proxy (thanks @samuelfekete @daneoshiga)
-   Improve docs (thanks @adamchainz)
+    - (only for aiohttp stub) Drop support to python 3.4 asyncio.coroutine (aiohttp doesn't support python it anymore)
-  1.13.0 - Fix support to latest aiohttp version (3.3.2). Fix content-type bug in aiohttp stub. Save URL with query params properly when using aiohttp.
+    - Fix aiohttp stub to work with aiohttp client (thanks @stj)
-  1.12.0 - Fix support to latest aiohttp version (3.2.1), Adapted setup to PEP508, Support binary responses on aiohttp, Dropped support for EOL python versions (2.6 and 3.3)
+    - Fix aiohttp stub to accept content type passed
-  1.11.1 Fix compatibility with newest requests and urllib3 releases
+    - Improve docs (thanks @adamchainz)
-  1.11.0 Allow injection of persistence methods + bugfixes (thanks @j-funk and @IvanMalison),
+
-   Support python 3.6 + CI tests (thanks @derekbekoe and @graingert),
+
-   Support pytest-asyncio coroutines (thanks @graingert)
+-  1.13.0 
-  1.10.5 Added a fix to httplib2 (thanks @carlosds730), Fix an issue with
+    - Fix support to latest aiohttp version (3.3.2). Fix content-type bug in aiohttp stub. Save URL with query params properly when using aiohttp.
-   aiohttp (thanks @madninja), Add missing requirement yarl (thanks @lamenezes),
+-  1.12.0 
-   Remove duplicate mock triple (thanks @FooBarQuaxx)
+    - Fix support to latest aiohttp version (3.2.1), Adapted setup to PEP508, Support binary responses on aiohttp, Dropped support for EOL python versions (2.6 and 3.3)
-  1.10.4 Fix an issue with asyncio aiohttp (thanks @madninja)
+-  1.11.1 
-  1.10.3 Fix some issues with asyncio and params (thanks @anovikov1984 and
+    - Fix compatibility with newest requests and urllib3 releases
-   @lamenezes), Fix some issues with cassette serialize / deserialize and empty
+-  1.11.0 
-   response bodies (thanks @gRoussac and @dz0ny)
+    - Allow injection of persistence methods + bugfixes (thanks @j-funk and @IvanMalison),
-  1.10.2 Fix 1.10.1 release - add aiohttp support back in
+    - Support python 3.6 + CI tests (thanks @derekbekoe and @graingert),
-  1.10.1 [bad release] Fix build for Fedora package + python2 (thanks @puiterwijk and @lamenezes)
+    - Support pytest-asyncio coroutines (thanks @graingert)
-  1.10.0 Add support for aiohttp (thanks @lamenezes)
+-  1.10.5 
-  1.9.0 Add support for boto3 (thanks @desdm, @foorbarna). Fix deepcopy issue
+    - Added a fix to httplib2 (thanks @carlosds730), Fix an issue with
-   for response headers when `decode_compressed_response` is enabled (thanks
+    - aiohttp (thanks @madninja), Add missing requirement yarl (thanks @lamenezes),
-   @nickdirienzo)
+    - Remove duplicate mock triple (thanks @FooBarQuaxx)
-  1.8.0 Fix for Serialization errors with JSON adapter (thanks
+-  1.10.4 
-   @aliaksandrb). Avoid concatenating bytes with strings (thanks
+    - Fix an issue with asyncio aiohttp (thanks @madninja)
-   @jaysonsantos). Exclude __pycache__ dirs & compiled files in sdist
+-  1.10.3 
-   (thanks @koobs). Fix Tornado support behavior for Tornado 3 (thanks
+    - Fix some issues with asyncio and params (thanks @anovikov1984 and @lamenezes)
-   @abhinav). decode_compressed_response option and filter (thanks
+    - Fix some issues with cassette serialize / deserialize and empty response bodies (thanks @gRoussac and @dz0ny)
-   @jayvdb).
+-  1.10.2 
-  1.7.4 [#217] Make use_cassette decorated functions actually return a
+    - Fix 1.10.1 release - add aiohttp support back in
-   value (thanks @bcen). [#199] Fix path transfromation defaults.
+-  1.10.1 
-   Better headers dictionary management.
+    - [bad release] Fix build for Fedora package + python2 (thanks @puiterwijk and @lamenezes)
-  1.7.3 [#188] ``additional_matchers`` kwarg on ``use_cassette``.
+-  1.10.0 
-   [#191] Actually support passing multiple before_record_request
+    - Add support for aiohttp (thanks @lamenezes)
-   functions (thanks @agriffis).
+-  1.9.0 
-  1.7.2 [#186] Get effective_url in tornado (thanks @mvschaik), [#187]
+    - Add support for boto3 (thanks @desdm, @foorbarna). 
-   Set request_time on Response object in tornado (thanks @abhinav).
+    - Fix deepcopy issue for response headers when `decode_compressed_response` is enabled (thanks @nickdirienzo)
-  1.7.1 [#183] Patch ``fetch_impl`` instead of the entire HTTPClient
+-  1.8.0 
-   class for Tornado (thanks @abhinav).
+    - Fix for Serialization errors with JSON adapter (thanks @aliaksandrb). 
-  1.7.0 [#177] Properly support coroutine/generator decoration. [#178]
+    - Avoid concatenating bytes with strings (thanks @jaysonsantos). 
-   Support distribute (thanks @graingert). [#163] Make compatibility
+    - Exclude __pycache__ dirs & compiled files in sdist (thanks @koobs). 
-   between python2 and python3 recorded cassettes more robust (thanks
+    - Fix Tornado support behavior for Tornado 3 (thanks @abhinav). 
-   @gward).
+    - decode_compressed_response option and filter (thanks @jayvdb).
-  1.6.1 [#169] Support conditional requirements in old versions of
+-  1.7.4 [#217] 
-   pip, Fix RST parse errors generated by pandoc, [Tornado] Fix
+    - Make use_cassette decorated functions actually return a value (thanks @bcen). 
-   unsupported features exception not being raised, [#166]
+    - [#199] Fix path transfromation defaults.
-   content-aware body matcher.
+    - Better headers dictionary management.
-  1.6.0 [#120] Tornado support (thanks @abhinav), [#147] packaging fixes
+-  1.7.3 [#188] 
-   (thanks @graingert), [#158] allow filtering post params in requests
+    - ``additional_matchers`` kwarg on ``use_cassette``.
-   (thanks @MrJohz), [#140] add xmlrpclib support (thanks @Diaoul).
+    - [#191] Actually support passing multiple before_record_request functions (thanks @agriffis).
-  1.5.2 Fix crash when cassette path contains cassette library
+-  1.7.2 
-   directory (thanks @gazpachoking).
+    - [#186] Get effective_url in tornado (thanks @mvschaik)
-  1.5.0 Automatic cassette naming and 'application/json' post data
+    - [#187] Set request_time on Response object in tornado (thanks @abhinav).
-   filtering (thanks @marco-santamaria).
+-  1.7.1 
-  1.4.2 Fix a bug caused by requests 2.7 and chunked transfer encoding
+    - [#183] Patch ``fetch_impl`` instead of the entire HTTPClient class for Tornado (thanks @abhinav).
-  1.4.1 Include README, tests, LICENSE in package. Thanks @ralphbean.
+-  1.7.0 
-  1.4.0 Filter post data parameters (thanks @eadmundo), support for
+    - [#177] Properly support coroutine/generator decoration. 
-   posting files through requests, inject\_cassette kwarg to access
+    - [#178] Support distribute (thanks @graingert). [#163] Make compatibility between python2 and python3 recorded cassettes more robust (thanks @gward).
-   cassette from ``use_cassette`` decorated function,
+-  1.6.1 
-   ``with_current_defaults`` actually works (thanks @samstav).
+    - [#169] Support conditional requirements in old versions of pip
-  1.3.0 Fix/add support for urllib3 (thanks @aisch), fix default port
+    - Fix RST parse errors generated by pandoc
-   for https (thanks @abhinav).
+    - [Tornado] Fix unsupported features exception not being raised
-  1.2.0 Add custom\_patches argument to VCR/Cassette objects to allow
+    - [#166] content-aware body matcher.
-   users to stub custom classes when cassettes become active.
+- 1.6.0
-  1.1.4 Add force reset around calls to actual connection from stubs,
+    - [#120] Tornado support (thanks @abhinav)
-   to ensure compatibility with the version of httplib/urlib2 in python
+    - [#147] packaging fixes (thanks @graingert)
-   2.7.9.
+    - [#158] allow filtering post params in requests (thanks @MrJohz)
-  1.1.3 Fix python3 headers field (thanks @rtaboada), fix boto test
+    - [#140] add xmlrpclib support (thanks @Diaoul).
-   (thanks @telaviv), fix new\_episodes record mode (thanks @jashugan),
+-  1.5.2
-   fix Windows connectionpool stub bug (thanks @gazpachoking), add
+    - Fix crash when cassette path contains cassette library directory (thanks @gazpachoking).
-   support for requests 2.5
+-  1.5.0
-  1.1.2 Add urllib==1.7.1 support. Make json serialize error handling
+    - Automatic cassette naming and 'application/json' post data filtering (thanks @marco-santamaria).
-   correct Improve logging of match failures.
+-  1.4.2 
-  1.1.1 Use function signature preserving ``wrapt.decorator`` to write
+    - Fix a bug caused by requests 2.7 and chunked transfer encoding
-   the decorator version of use\_cassette in order to ensure
+-  1.4.1 
-   compatibility with py.test fixtures and python 2. Move all request
+    - Include README, tests, LICENSE in package. Thanks @ralphbean.
-   filtering into the ``before_record_callable``.
+-  1.4.0 
-  1.1.0 Add ``before_record_response``. Fix several bugs related to the
+    - Filter post data parameters (thanks @eadmundo)
-   context management of cassettes.
+    - Support for posting files through requests, inject\_cassette kwarg to access cassette from ``use_cassette`` decorated function, ``with_current_defaults`` actually works (thanks @samstav).
-  1.0.3: Fix an issue with requests 2.4 and make sure case sensitivity
+-  1.3.0
-   is consistent across python versions
+    - Fix/add support for urllib3 (thanks @aisch)
-  1.0.2: Fix an issue with requests 2.3
+    - Fix default port  for https (thanks @abhinav).
-  1.0.1: Fix a bug with the new ignore requests feature and the once
+-  1.2.0 
-   record mode
+    - Add custom\_patches argument to VCR/Cassette objects to allow users to stub custom classes when cassettes become active.
-  1.0.0: *BACKWARDS INCOMPATIBLE*: Please see the 'upgrade' section in
+-  1.1.4
-   the README. Take a look at the matcher section as well, you might
+    - Add force reset around calls to actual connection from stubs, to ensure compatibility with the version of httplib/urlib2 in python 2.7.9.
-   want to update your ``match_on`` settings. Add support for filtering
+-  1.1.3
-   sensitive data from requests, matching query strings after the order
+    - Fix python3 headers field (thanks @rtaboada)
-   changes and improving the built-in matchers, (thanks to @mshytikov),
+    - fix boto test (thanks @telaviv)
-   support for ignoring requests to certain hosts, bump supported
+    - fix new\_episodes record mode (thanks @jashugan),
-   Python3 version to 3.4, fix some bugs with Boto support (thanks
+    - fix Windows connectionpool stub bug (thanks @gazpachoking)
-   @marusich), fix error with URL field capitalization in README (thanks
+    - add support for requests 2.5
-   @simon-weber), added some log messages to help with debugging, added
+-  1.1.2
-   ``all_played`` property on cassette (thanks @mshytikov)
+    - Add urllib==1.7.1 support. 
-  0.7.0: VCR.py now supports Python 3! (thanks @asundg) Also I
+    - Make json serialize error handling correct
-   refactored the stub connections quite a bit to add support for the
+    - Improve logging of match failures.
-   putrequest and putheader calls. This version also adds support for
+-  1.1.1 
-   httplib2 (thanks @nilp0inter). I have added a couple tests for boto
+    - Use function signature preserving ``wrapt.decorator`` to write the decorator version of use\_cassette in order to ensure compatibility with py.test fixtures and python 2. 
-   since it is an http client in its own right. Finally, this version
+    - Move all request filtering into the ``before_record_callable``.
-   includes a fix for a bug where requests wasn't being patched properly
+-  1.1.0 
-   (thanks @msabramo).
+    - Add ``before_record_response``. Fix several bugs related to the context management of cassettes.
-  0.6.0: Store response headers as a list since a HTTP response can
+-  1.0.3 
-   have the same header twice (happens with set-cookie sometimes). This
+    - Fix an issue with requests 2.4 and make sure case sensitivity is consistent across python versions
-   has the added benefit of preserving the order of headers. Thanks
+-  1.0.2
-   @smallcode for the bug report leading to this change. I have made an
+    - Fix an issue with requests 2.3
-   effort to ensure backwards compatibility with the old cassettes'
+-  1.0.1
-   header storage mechanism, but if you want to upgrade to the new
+    - Fix a bug with the new ignore requests feature and the once record mode
-   header storage, you should delete your cassettes and re-record them.
+-  1.0.0 
-   Also this release adds better error messages (thanks @msabramo) and
+    - *BACKWARDS INCOMPATIBLE*: Please see the 'upgrade' section in the README. Take a look at the matcher section as well, you might want to update your ``match_on`` settings. 
-   adds support for using VCR as a decorator (thanks @smallcode for the
+    - Add support for filtering sensitive data from requests, matching query strings after the order changes and improving the built-in matchers, (thanks to @mshytikov)
-   motivation)
+    - Support for ignoring requests to certain hosts, bump supported Python3 version to 3.4, fix some bugs with Boto support (thanks @marusich)
-  0.5.0: Change the ``response_of`` method to ``responses_of`` since
+    - Fix error with URL field capitalization in README (thanks @simon-weber)
-   cassettes can now contain more than one response for a request. Since
+    - Added some log messages to help with debugging
-   this changes the API, I'm bumping the version. Also includes 2
+    - Added ``all_played`` property on cassette (thanks @mshytikov)
-   bugfixes: a better error message when attempting to overwrite a
+
-   cassette file, and a fix for a bug with requests sessions (thanks
+-  0.7.0
-   @msabramo)
+    - VCR.py now supports Python 3! (thanks @asundg) 
-  0.4.0: Change default request recording behavior for multiple
+    - Also I refactored the stub connections quite a bit to add support for the putrequest and putheader calls.
-   requests. If you make the same request multiple times to the same
+    - This version also adds support for httplib2 (thanks @nilp0inter). 
-   URL, the response might be different each time (maybe the response
+    - I have added a couple tests for boto since it is an http client in its own right.
-   has a timestamp in it or something), so this will make the same
+    - Finally, this version includes a fix for a bug where requests wasn't being patched properly (thanks @msabramo).
-   request multiple times and save them all. Then, when you are
+-  0.6.0
-   replaying the cassette, the responses will be played back in the same
+    - Store response headers as a list since a HTTP response can have the same header twice (happens with set-cookie sometimes).
-   order in which they were received. If you were making multiple
+        - This has the added benefit of preserving the order of headers. 
-   requests to the same URL in a cassette before version 0.4.0, you
+        - Thanks @smallcode for the bug report leading to this change. 
-   might need to regenerate your cassette files. Also, removes support
+    - I have made an effort to ensure backwards compatibility with the old cassettes' header storage mechanism, but if you want to upgrade to the new header storage, you should delete your cassettes and re-record them.
-   for the cassette.play\_count counter API, since individual requests
+    - Also this release adds better error messages (thanks @msabramo) 
-   aren't unique anymore. A cassette might contain the same request
+    - and adds support for using VCR as a decorator (thanks @smallcode for the motivation)
-   several times. Also removes secure overwrite feature since that was
+-  0.5.0
-   breaking overwriting files in Windows, and fixes a bug preventing
+    - Change the ``response_of`` method to ``responses_of`` since cassettes can now contain more than one response for a request. 
-   request's automatic body decompression from working.
+        - Since this changes the API, I'm bumping the version. 
-  0.3.5: Fix compatibility with requests 2.x
+    - Also includes 2 bugfixes: 
-  0.3.4: Bugfix: close file before renaming it. This fixes an issue on
+        - a better error message when attempting to overwrite a cassette file, 
-   Windows. Thanks @smallcode for the fix.
+        - and a fix for a bug with requests sessions (thanks @msabramo)
-  0.3.3: Bugfix for error message when an unreigstered custom matcher
+-  0.4.0
-   was used
+    - Change default request recording behavior for multiple requests.
-  0.3.2: Fix issue with new config syntax and the ``match_on``
+        - If you make the same request multiple times to the same URL, the response might be different each time (maybe the response has a timestamp in it or something), so this will make the same request multiple times and save them all. 
-   parameter. Thanks, @chromy!
+        - Then, when you are replaying the cassette, the responses will be played back in the same order in which they were received.
-  0.3.1: Fix issue causing full paths to be sent on the HTTP request
+        - If you were making multiple requests to the same URL in a cassette before version 0.4.0, you might need to regenerate your cassette files.
-   line.
+        - Also, removes support for the cassette.play\_count counter API, since individual requests aren't unique anymore.
-  0.3.0: *Backwards incompatible release* - Added support for record
+        - A cassette might contain the same request several times.
-   modes, and changed the default recording behavior to the "once"
+    - Also removes secure overwrite feature since that was breaking overwriting files in Windows
-   record mode. Please see the documentation on record modes for more.
+    - And fixes a bug preventing request's automatic body decompression from working.
-   Added support for custom request matching, and changed the default
+-  0.3.5
-   request matching behavior to match only on the URL and method. Also,
+    - Fix compatibility with requests 2.x
-   improved the httplib mocking to add support for the
+-  0.3.4
-   ``HTTPConnection.send()`` method. This means that requests won't
+    - Bugfix: close file before renaming it. This fixes an issue on Windows. Thanks @smallcode for the fix.
-   actually be sent until the response is read, since I need to record
+-  0.3.3
-   the entire request in order to match up the appropriate response. I
+    - Bugfix for error message when an unreigstered custom matcher was used
-   don't think this should cause any issues unless you are sending
+-  0.3.2
-   requests without ever loading the response (which none of the
+    - Fix issue with new config syntax and the ``match_on`` parameter. Thanks, @chromy!
-   standard httplib wrappers do, as far as I know. Thanks to @fatuhoku
+-  0.3.1
-   for some of the ideas and the motivation behind this release.
+    - Fix issue causing full paths to be sent on the HTTP request line.
-  0.2.1: Fixed missing modules in setup.py
+-  0.3.0
-  0.2.0: Added configuration API, which lets you configure some
+    - *Backwards incompatible release*
-   settings on VCR (see the README). Also, VCR no longer saves cassettes
+    - Added support for record modes, and changed the default recording behavior to the "once" record mode. Please see the documentation on record modes for more.
-   if they haven't changed at all and supports JSON as well as YAML
+    - Added support for custom request matching, and changed the default request matching behavior to match only on the URL and method. 
-   (thanks @sirpengi). Added amazing new skeumorphic logo, thanks
+    - Also, improved the httplib mocking to add support for the ``HTTPConnection.send()`` method.
-   @hairarrow.
+        - This means that requests won't actually be sent until the response is read, since I need to record the entire request in order to match up the appropriate response.
-  0.1.0: *backwards incompatible release - delete your old cassette
+        - I don't think this should cause any issues unless you are sending requests without ever loading the response (which none of the standard httplib wrappers do, as far as I know).
-   files*: This release adds the ability to access the cassette to make
+    - Thanks to @fatuhoku for some of the ideas and the motivation behind this release.
-   assertions on it, as well as a major code refactor thanks to
+-  0.2.1
-   @dlecocq. It also fixes a couple longstanding bugs with redirects and
+    - Fixed missing modules in setup.py
-   HTTPS. [#3 and #4]
+-  0.2.0
-  0.0.4: If you have libyaml installed, vcrpy will use the c bindings
+    - Added configuration API, which lets you configure some settings on VCR (see the README). 
-   instead. Speed up your tests! Thanks @dlecocq
+    - Also, VCR no longer saves cassettes if they haven't changed at all and supports JSON as well as YAML (thanks @sirpengi).
-  0.0.3: Add support for requests 1.2.3. Support for older versions of
+    - Added amazing new skeumorphic logo, thanks @hairarrow.
-   requests dropped (thanks @vitormazzi and @bryanhelmig)
+-  0.1.0
-  0.0.2: Add support for requests / urllib3
+    - *backwards incompatible release - delete your old cassette files*
-  0.0.1: Initial Release
+    - This release adds the ability to access the cassette to make assertions on it
    - as well as a major code refactor thanks to @dlecocq. 
    - It also fixes a couple longstanding bugs with redirects and HTTPS. [#3 and #4]
 -  0.0.4
    - If you have libyaml installed, vcrpy will use the c bindings instead. Speed up your tests! Thanks @dlecocq
 -  0.0.3
    - Add support for requests 1.2.3. Support for older versions of requests dropped (thanks @vitormazzi and @bryanhelmig)
 -  0.0.2
    - Add support for requests / urllib3
 -  0.0.1
    - Initial Release
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -12,8 +12,33 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 import codecs
 import os
 import re
 here = os.path.abspath(os.path.dirname(__file__))
 def read(*parts):
    # intentionally *not* adding an encoding option to open, See:
    #   https://github.com/pypa/virtualenv/issues/201#issuecomment-3145690
    with codecs.open(os.path.join(here, *parts), "r") as fp:
        return fp.read()
 def find_version(*file_paths):
    version_file = read(*file_paths)
    version_match = re.search(r"^__version__ = ['\"]([^'\"]*)['\"]", version_file, re.M)
    if version_match:
        return version_match.group(1)
    raise RuntimeError("Unable to find version string.")
 autodoc_default_options = {
    "members": None,
    "undoc-members": None,
 }
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -27,7 +52,14 @@ import os
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ["sphinx.ext.autodoc", "sphinx.ext.intersphinx", "sphinx.ext.coverage", "sphinx.ext.viewcode"]
+extensions = [
    "sphinx.ext.autodoc",
    "sphinx.ext.intersphinx",
    "sphinx.ext.coverage",
    "sphinx.ext.viewcode",
    "sphinx.ext.todo",
    "sphinx.ext.githubpages",
 ]
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]
@@ -44,18 +76,18 @@ source_suffix = ".rst"
 master_doc = "index"
 # General information about the project.
-project = u"vcrpy"
+project = "vcrpy"
-copyright = u"2015, Kevin McCarthy"
+copyright = "2015, Kevin McCarthy"
-author = u"Kevin McCarthy"
+author = "Kevin McCarthy"
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = "1.7.4"
+#  version = "1.7.4"
 # The full version, including alpha/beta/rc tags.
-release = "1.7.4"
+version = release = find_version("..", "vcr", "__init__.py")
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -106,11 +138,11 @@ todo_include_todos = False
 # The theme to use for HTML and HTML Help pages.
 # https://read-the-docs.readthedocs.io/en/latest/theme.html#how-do-i-use-this-locally-and-on-read-the-docs
-if "READTHEDOCS" not in os.environ:
+#  if "READTHEDOCS" not in os.environ:
-    import sphinx_rtd_theme
+#      import sphinx_rtd_theme
-
+#
-    html_theme = "sphinx_rtd_theme"
+#      html_theme = "sphinx_rtd_theme"
-    html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
+#      html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
@@ -153,6 +185,8 @@ html_static_path = ["_static"]
 # Custom sidebar templates, maps document names to template names.
 # html_sidebars = {}
 html_sidebars = {"**": ["globaltoc.html", "relations.html", "sourcelink.html", "searchbox.html"]}
 # Additional templates that should be rendered to pages, maps page names to
 # template names.
@@ -217,7 +251,9 @@ latex_elements = {
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
-latex_documents = [(master_doc, "vcrpy.tex", u"vcrpy Documentation", u"Kevin McCarthy", "manual")]
+latex_documents = [
    (master_doc, "vcrpy.tex", "vcrpy Documentation", "Kevin McCarthy", "manual"),
 ]
 # The name of an image file (relative to this directory) to place at the top of
 # the title page.
@@ -244,7 +280,7 @@ latex_documents = [(master_doc, "vcrpy.tex", u"vcrpy Documentation", u"Kevin McC
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [(master_doc, "vcrpy", u"vcrpy Documentation", [author], 1)]
+man_pages = [(master_doc, "vcrpy", "vcrpy Documentation", [author], 1)]
 # If true, show URL addresses after external links.
 # man_show_urls = False
@@ -259,12 +295,12 @@ texinfo_documents = [
    (
        master_doc,
        "vcrpy",
-        u"vcrpy Documentation",
+        "vcrpy Documentation",
        author,
        "vcrpy",
        "One line description of project.",
        "Miscellaneous",
-    )
+    ),
 ]
 # Documents to append as an appendix to all manuals.
@@ -282,3 +318,4 @@ texinfo_documents = [
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {"https://docs.python.org/": None}
 html_theme = "alabaster"
--- a/docs/contributing.rst
+++ b/docs/contributing.rst
@@ -1,6 +1,10 @@
 Contributing
 ============
 .. image:: _static/vcr.svg
   :alt: vcr.py logo
   :align: right
 🚀 Milestones
 --------------
 For anyone interested in the roadmap and projected release milestones please see the following link:
@@ -81,18 +85,22 @@ Running VCR's test suite
 The tests are all run automatically on `Travis
 CI <https://travis-ci.org/kevin1024/vcrpy>`__, but you can also run them
-yourself using `py.test <http://pytest.org/>`__ and
+yourself using `pytest <http://pytest.org/>`__ and
-`Tox <http://tox.testrun.org/>`__. Tox will automatically run them in
+`Tox <http://tox.testrun.org/>`__. 
-all environments VCR.py supports. The test suite is pretty big and slow,
+
-but you can tell tox to only run specific tests like this::
+Tox will automatically run them in all environments VCR.py supports if they are available on your `PATH`. Alternatively you can use `tox-pyenv <https://pypi.org/project/tox-pyenv/>`_ with 
 `pyenv <https://github.com/pyenv/pyenv>`_. 
 We recommend you read the documentation for each and see the section further below.
 The test suite is pretty big and slow, but you can tell tox to only run specific tests like this::
    tox -e {pyNN}-{HTTP_LIBRARY} -- <pytest flags passed through>
-    tox -e py27-requests -- -v -k "'test_status_code or test_gzip'"
+    tox -e py36-requests -- -v -k "'test_status_code or test_gzip'"
    tox -e py37-requests -- -v --last-failed
 This will run only tests that look like ``test_status_code`` or
-``test_gzip`` in the test suite, and only in the python 2.7 environment
+``test_gzip`` in the test suite, and only in the python 3.6 environment
 that has ``requests`` installed.
 Also, in order for the boto tests to run, you will need an AWS key.
@@ -106,8 +114,8 @@ Using PyEnv with VCR's test suite
 ---------------------------------
 PyEnv is a tool for managing multiple installation of python on your system.
-See the full documentation at their `github <https://github.com/pyenv/pyenv>` 
+See the full documentation at their `github <https://github.com/pyenv/pyenv>`_ 
-but we are also going to use `tox-pyenv <https://pypi.org/project/tox-pyenv/>` 
+but we are also going to use `tox-pyenv <https://pypi.org/project/tox-pyenv/>`_ 
 in this example::
    git clone https://github.com/pyenv/pyenv ~/.pyenv
@@ -122,10 +130,10 @@ in this example::
    pip install tox tox-pyenv
    # Install supported versions (at time of writing), this does not activate them
-    pyenv install 2.7.10 3.5.7 3.6.9 3.7.4 3.8-dev pypy2.6-7.1.1 pypy3.6-7.1.1
+    pyenv install 3.5.9 3.6.9 3.7.5 3.8.0 pypy3.6-7.2.0
    # This activates them
-    pyenv local 2.7.10 3.5.7 3.6.9 3.7.4 3.8-dev pypy2.6-7.1.1 pypy3.6-7.1.1
+    pyenv local 3.5.9 3.6.9 3.7.5 3.8.0 pypy3.6-7.2.0
    # Run the whole test suite
    tox
--- a/docs/debugging.rst
+++ b/docs/debugging.rst
@@ -44,7 +44,7 @@ It can return multiple similar requests with :
 CannotOverwriteExistingCassetteException message example :
-.. code:: python
+.. code::
    CannotOverwriteExistingCassetteException: Can't overwrite existing cassette ('cassette.yaml') in your current record mode ('once').
    No match for the request (<Request (GET) https://www.googleapis.com/?alt=json&maxResults=200>) was found.
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -4,7 +4,7 @@ Contents
 ========
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 3
   installation
   usage
@@ -15,6 +15,7 @@ Contents
   contributing
   changelog
 ==================
 Indices and tables
 ==================
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -9,8 +9,7 @@ with pip::
 Compatibility
 -------------
-VCR.py supports Python 2.7 and 3.5+, and
+VCR.py supports Python 3.5+, and `pypy <http://pypy.org>`__.
 `pypy <http://pypy.org>`__.
 The following HTTP libraries are supported:
--- a/setup.py
+++ b/setup.py
@@ -1,11 +1,31 @@
 #!/usr/bin/env python
 import codecs
 import os
 import re
 import sys
 from setuptools import setup, find_packages
 from setuptools.command.test import test as TestCommand
 long_description = open("README.rst", "r").read()
 here = os.path.abspath(os.path.dirname(__file__))
 def read(*parts):
    # intentionally *not* adding an encoding option to open, See:
    #   https://github.com/pypa/virtualenv/issues/201#issuecomment-3145690
    with codecs.open(os.path.join(here, *parts), "r") as fp:
        return fp.read()
 def find_version(*file_paths):
    version_file = read(*file_paths)
    version_match = re.search(r"^__version__ = ['\"]([^'\"]*)['\"]", version_file, re.M)
    if version_match:
        return version_match.group(1)
    raise RuntimeError("Unable to find version string.")
 class PyTest(TestCommand):
@@ -26,26 +46,20 @@ install_requires = [
    "PyYAML",
    "wrapt",
    "six>=1.5",
    'contextlib2; python_version=="2.7"',
    'mock; python_version=="2.7"',
    'yarl; python_version>="3.6"',
    'yarl<1.4; python_version=="3.5"',
 ]
 excluded_packages = ["tests*"]
 if sys.version_info[0] == 2:
    excluded_packages.append("vcr.stubs.aiohttp_stubs")
 setup(
    name="vcrpy",
-    version="3.0.0",
+    version=find_version("vcr", "__init__.py"),
    description=("Automatically mock your HTTP interactions to simplify and " "speed up testing"),
    long_description=long_description,
    author="Kevin McCarthy",
    author_email="me@kevinmccarthy.org",
    url="https://github.com/kevin1024/vcrpy",
-    packages=find_packages(exclude=excluded_packages),
+    packages=find_packages(exclude=["tests*"]),
-    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*",
+    python_requires=">=3.5",
    install_requires=install_requires,
    license="MIT",
    tests_require=["pytest", "mock", "pytest-httpbin"],
@@ -54,12 +68,12 @@ setup(
        "Environment :: Console",
        "Intended Audience :: Developers",
        "Programming Language :: Python",
        "Programming Language :: Python :: 2",
        "Programming Language :: Python :: 2.7",
        "Programming Language :: Python :: 3",
        "Programming Language :: Python :: 3.5",
        "Programming Language :: Python :: 3.6",
        "Programming Language :: Python :: 3.7",
        "Programming Language :: Python :: 3.8",
        "Programming Language :: Python :: 3 :: Only",
        "Programming Language :: Python :: Implementation :: CPython",
        "Programming Language :: Python :: Implementation :: PyPy",
        "Topic :: Software Development :: Testing",
--- a/tests/integration/test_basic.py
+++ b/tests/integration/test_basic.py
@@ -3,7 +3,7 @@
 # External imports
 import os
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 # Internal imports
 import vcr
--- a/tests/integration/test_boto.py
+++ b/tests/integration/test_boto.py
@@ -6,13 +6,8 @@ import boto  # NOQA
 import boto.iam  # NOQA
 from boto.s3.connection import S3Connection  # NOQA
 from boto.s3.key import Key  # NOQA
 import vcr  # NOQA
 try:  # NOQA
    from ConfigParser import DuplicateSectionError  # NOQA
 except ImportError:  # NOQA
    # python3
 from configparser import DuplicateSectionError  # NOQA
 import vcr  # NOQA
 def test_boto_stubs(tmpdir):
--- a/tests/integration/test_config.py
+++ b/tests/integration/test_config.py
@@ -2,7 +2,7 @@ import os
 import json
 import pytest
 import vcr
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 def test_set_serializer_default_config(tmpdir, httpbin):
--- a/tests/integration/test_disksaver.py
+++ b/tests/integration/test_disksaver.py
@@ -4,7 +4,7 @@
 # External imports
 import os
 import time
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 # Internal imports
 import vcr
--- a/tests/integration/test_filter.py
+++ b/tests/integration/test_filter.py
@@ -1,8 +1,8 @@
 import base64
 import pytest
-from six.moves.urllib.request import urlopen, Request
+from urllib.request import urlopen, Request
-from six.moves.urllib.parse import urlencode
+from urllib.parse import urlencode
-from six.moves.urllib.error import HTTPError
+from urllib.error import HTTPError
 import vcr
 import json
 from assertions import assert_cassette_has_one_response, assert_is_json
--- a/tests/integration/test_httplib2.py
+++ b/tests/integration/test_httplib2.py
@@ -3,7 +3,7 @@
 import sys
-from six.moves.urllib_parse import urlencode
+from urllib.parse import urlencode
 import pytest
 import pytest_httpbin.certs
@@ -111,7 +111,7 @@ def test_post_data(tmpdir, httpbin_both):
 def test_post_unicode_data(tmpdir, httpbin_both):
    """Ensure that it works when posting unicode data"""
-    data = urlencode({"snowman": u"☃".encode("utf-8")})
+    data = urlencode({"snowman": "☃".encode()})
    url = httpbin_both.url + "/post"
    with vcr.use_cassette(str(tmpdir.join("post_data.yaml"))):
        _, res1 = http().request(url, "POST", data)
--- a/tests/integration/test_ignore.py
+++ b/tests/integration/test_ignore.py
@@ -1,4 +1,4 @@
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 import socket
 from contextlib import contextmanager
 import vcr
--- a/tests/integration/test_matchers.py
+++ b/tests/integration/test_matchers.py
@@ -1,6 +1,6 @@
 import vcr
 import pytest
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 DEFAULT_URI = "http://httpbin.org/get?p1=q1&p2=q2"  # base uri for testing
--- a/tests/integration/test_multiple.py
+++ b/tests/integration/test_multiple.py
@@ -1,6 +1,6 @@
 import pytest
 import vcr
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 def test_making_extra_request_raises_exception(tmpdir, httpbin):
--- a/tests/integration/test_proxy.py
+++ b/tests/integration/test_proxy.py
@@ -5,8 +5,9 @@
 import multiprocessing
 import pytest
-from six.moves import socketserver, SimpleHTTPServer
+import http.server
-from six.moves.urllib.request import urlopen
+import socketserver
 from urllib.request import urlopen
 # Internal imports
 import vcr
@@ -15,7 +16,7 @@ import vcr
 requests = pytest.importorskip("requests")
-class Proxy(SimpleHTTPServer.SimpleHTTPRequestHandler):
+class Proxy(http.server.SimpleHTTPRequestHandler):
    """
    Simple proxy server.
--- a/tests/integration/test_record_mode.py
+++ b/tests/integration/test_record_mode.py
@@ -1,6 +1,6 @@
 import pytest
 import vcr
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 def test_once_record_mode(tmpdir, httpbin):
--- a/tests/integration/test_register_matcher.py
+++ b/tests/integration/test_register_matcher.py
@@ -1,5 +1,5 @@
 import vcr
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 def true_matcher(r1, r2):
--- a/tests/integration/test_register_persister.py
+++ b/tests/integration/test_register_persister.py
@@ -3,7 +3,7 @@
 # External imports
 import os
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 # Internal imports
 import vcr
--- a/tests/integration/test_register_serializer.py
+++ b/tests/integration/test_register_serializer.py
@@ -1,7 +1,7 @@
 import vcr
-class MockSerializer(object):
+class MockSerializer:
    def __init__(self):
        self.serialize_count = 0
        self.deserialize_count = 0
--- a/tests/integration/test_request.py
+++ b/tests/integration/test_request.py
@@ -1,5 +1,5 @@
 import vcr
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 def test_recorded_request_uri_with_redirected_request(tmpdir, httpbin):
--- a/tests/integration/test_stubs.py
+++ b/tests/integration/test_stubs.py
@@ -1,7 +1,7 @@
 import vcr
 import zlib
 import json
-import six.moves.http_client as httplib
+import http.client as httplib
 from assertions import assert_is_json
--- a/tests/integration/test_urllib2.py
+++ b/tests/integration/test_urllib2.py
@@ -2,8 +2,8 @@
 """Integration tests with urllib2"""
 import ssl
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
-from six.moves.urllib_parse import urlencode
+from urllib.parse import urlencode
 import pytest_httpbin.certs
 # Internal imports
@@ -104,7 +104,7 @@ def test_post_data(httpbin_both, tmpdir):
 def test_post_unicode_data(httpbin_both, tmpdir):
    """Ensure that it works when posting unicode data"""
-    data = urlencode({"snowman": u"☃".encode("utf-8")}).encode("utf-8")
+    data = urlencode({"snowman": "☃".encode()}).encode("utf-8")
    url = httpbin_both.url + "/post"
    with vcr.use_cassette(str(tmpdir.join("post_data.yaml"))):
        res1 = urlopen_with_cafile(url, data).read()
--- a/tests/integration/test_wild.py
+++ b/tests/integration/test_wild.py
@@ -1,16 +1,13 @@
 import http.client as httplib
 import multiprocessing
 import pytest
-from six.moves import xmlrpc_client, xmlrpc_server
+from xmlrpc.client import ServerProxy
 from xmlrpc.server import SimpleXMLRPCServer
 requests = pytest.importorskip("requests")
 import vcr  # NOQA
 try:
    import httplib
 except ImportError:
    import http.client as httplib
 def test_domain_redirect():
    """Ensure that redirects across domains are considered unique"""
@@ -80,7 +77,7 @@ def test_amazon_doctype(tmpdir):
 def start_rpc_server(q):
-    httpd = xmlrpc_server.SimpleXMLRPCServer(("127.0.0.1", 0))
+    httpd = SimpleXMLRPCServer(("127.0.0.1", 0))
    httpd.register_function(pow)
    q.put("http://{}:{}".format(*httpd.server_address))
    httpd.serve_forever()
@@ -99,11 +96,11 @@ def rpc_server():
 def test_xmlrpclib(tmpdir, rpc_server):
    with vcr.use_cassette(str(tmpdir.join("xmlrpcvideo.yaml"))):
-        roundup_server = xmlrpc_client.ServerProxy(rpc_server, allow_none=True)
+        roundup_server = ServerProxy(rpc_server, allow_none=True)
        original_schema = roundup_server.pow(2, 4)
    with vcr.use_cassette(str(tmpdir.join("xmlrpcvideo.yaml"))):
-        roundup_server = xmlrpc_client.ServerProxy(rpc_server, allow_none=True)
+        roundup_server = ServerProxy(rpc_server, allow_none=True)
        second_schema = roundup_server.pow(2, 4)
    assert original_schema == second_schema
--- a/tests/unit/test_cassettes.py
+++ b/tests/unit/test_cassettes.py
@@ -1,12 +1,13 @@
 import contextlib
 import copy
 import inspect
 import mock
 import os
-from six.moves import http_client as httplib
+import http.client as httplib
 import pytest
 import yaml
 from vcr.compat import mock, contextlib
 from vcr.cassette import Cassette
 from vcr.errors import UnhandledHTTPRequestError
 from vcr.patch import force_reset
@@ -208,7 +209,7 @@ def test_nesting_context_managers_by_checking_references_of_http_connection():
 def test_custom_patchers():
-    class Test(object):
+    class Test:
        attribute = None
    with Cassette.use(path="custom_patches", custom_patches=((Test, "attribute", VCRHTTPSConnection),)):
--- a/tests/unit/test_errors.py
+++ b/tests/unit/test_errors.py
@@ -1,6 +1,7 @@
 import mock
 import pytest
 from vcr.compat import mock
 from vcr import errors
 from vcr.cassette import Cassette
--- a/tests/unit/test_filters.py
+++ b/tests/unit/test_filters.py
@@ -1,4 +1,4 @@
-from six import BytesIO
+from io import BytesIO
 from vcr.filters import (
    remove_headers,
    replace_headers,
@@ -8,10 +8,10 @@ from vcr.filters import (
    replace_post_data_parameters,
    decode_response,
 )
 from vcr.compat import mock
 from vcr.request import Request
 import gzip
 import json
 import mock
 import zlib
--- a/tests/unit/test_matchers.py
+++ b/tests/unit/test_matchers.py
@@ -1,5 +1,5 @@
 import itertools
-from vcr.compat import mock
+import mock
 import pytest
--- a/tests/unit/test_response.py
+++ b/tests/unit/test_response.py
@@ -1,8 +1,5 @@
 # coding: UTF-8
 import io
 import unittest
 import six
 from vcr.stubs import VCRHTTPResponse
@@ -58,7 +55,6 @@ def test_response_headers_should_have_correct_values():
    assert response.headers.get("date") == "Fri, 24 Oct 2014 18:35:37 GMT"
@unittest.skipIf(six.PY2, "Regression test for Python3 only")
 def test_response_parses_correctly_and_fp_attribute_error_is_not_thrown():
    """
    Regression test for https://github.com/kevin1024/vcrpy/issues/440
--- a/tests/unit/test_serialize.py
+++ b/tests/unit/test_serialize.py
@@ -1,7 +1,8 @@
 # -*- encoding: utf-8 -*-
 import mock
 import pytest
 from vcr.compat import mock
 from vcr.request import Request
 from vcr.serialize import deserialize, serialize
 from vcr.serializers import yamlserializer, jsonserializer, compat
@@ -29,7 +30,7 @@ def test_deserialize_new_json_cassette():
        deserialize(f.read(), jsonserializer)
-REQBODY_TEMPLATE = u"""\
+REQBODY_TEMPLATE = """\
 interactions:
 - request:
    body: {req_body}
--- a/tests/unit/test_stubs.py
+++ b/tests/unit/test_stubs.py
@@ -1,9 +1,10 @@
 import mock
 from vcr.stubs import VCRHTTPSConnection
 from vcr.compat import mock
 from vcr.cassette import Cassette
-class TestVCRConnection(object):
+class TestVCRConnection:
    def test_setting_of_attributes_get_propogated_to_real_connection(self):
        vcr_connection = VCRHTTPSConnection("www.examplehost.com")
        vcr_connection.ssl_version = "example_ssl_version"
--- a/tests/unit/test_vcr.py
+++ b/tests/unit/test_vcr.py
@@ -1,10 +1,10 @@
 import mock
 import os
 import pytest
-from six.moves import http_client as httplib
+import http.client as httplib
 from vcr import VCR, use_cassette
 from vcr.compat import mock
 from vcr.request import Request
 from vcr.stubs import VCRHTTPSConnection
 from vcr.patch import _HTTPConnection, force_reset
@@ -170,7 +170,7 @@ def test_fixtures_with_use_cassette(random_fixture):
 def test_custom_patchers():
-    class Test(object):
+    class Test:
        attribute = None
        attribute2 = None
--- a/tox.ini
+++ b/tox.ini
@@ -3,8 +3,8 @@ skip_missing_interpreters=true
 envlist = 
  cov-clean,
  lint,
-  {py27,py35,py36,py37,py38,pypy,pypy3}-{requests,httplib2,urllib3,tornado4,boto3},
+  {py35,py36,py37,py38}-{requests,httplib2,urllib3,tornado4,boto3,aiohttp},
-  {py35,py36,py37,py38}-{aiohttp},
+  {pypy3}-{requests,httplib2,urllib3,tornado4,boto3},
  cov-report
@@ -34,6 +34,27 @@ deps =
  flake8 
  black
 [testenv:docs]
 # Running sphinx from inside the "docs" directory
 # ensures it will not pick up any stray files that might
 # get into a virtual environment under the top-level directory
 # or other artifacts under build/
 changedir = docs
 # The only dependency is sphinx
 # If we were using extensions packaged separately,
 # we would specify them here.
 # A better practice is to specify a specific version of sphinx.
 deps =
    sphinx
    sphinx_rtd_theme
 # This is the sphinx command to generate HTML.
 # In other circumstances, we might want to generate a PDF or an ebook
 commands =
    sphinx-build -W -b html -d {envtmpdir}/doctrees . {envtmpdir}/html
 # We use Python 3.7. Tox sometimes tries to autodetect it based on the name of
 # the testenv, but "docs" does not give useful clues so we have to be explicit.
 basepython = python3.7
 [testenv]
 # Need to use develop install so that paths
 # for aggregate code coverage combine
@@ -51,17 +72,17 @@ deps =
    requests: requests>=2.22.0
    httplib2: httplib2
    urllib3: urllib3
-    {py27,py35,py36,pypy}-tornado4: tornado>=4,<5
+    {py35,py36}-tornado4: tornado>=4,<5
-    {py27,py35,py36,pypy}-tornado4: pytest-tornado
+    {py35,py36}-tornado4: pytest-tornado
-    {py27,py35,py36}-tornado4: pycurl
+    {py35,py36}-tornado4: pycurl
    boto3: boto3
    boto3: urllib3
    aiohttp: aiohttp
    aiohttp: pytest-asyncio
    aiohttp: pytest-aiohttp
 depends = 
-  {py27,py35,py36,py37,pypy}-{lint,requests,httplib2,urllib3,tornado4,boto3},{py35,py36,py37}-{aiohttp}: cov-clean
+  lint,{py35,py36,py37,py38,pypy3}-{requests,httplib2,urllib3,tornado4,boto3},{py35,py36,py37,py38}-{aiohttp}: cov-clean
-  cov-report: {py27,py35,py36,py37,pypy}-{lint,requests,httplib2,urllib3,tornado4,boto3},{py35,py36,py37}-{aiohttp}
+  cov-report: lint,{py35,py36,py37,py38,pypy3}-{requests,httplib2,urllib3,tornado4,boto3},{py35,py36,py37,py38}-{aiohttp}
 passenv =
    AWS_ACCESS_KEY_ID
    AWS_DEFAULT_REGION
--- a/vcr.png
+++ b/vcr.png
--- a/vcr/init.py
+++ b/vcr/init.py
@@ -1,23 +1,8 @@
 import logging
 import warnings
 import sys
 from .config import VCR
 # Set default logging handler to avoid "No handler found" warnings.
 try:  # Python 2.7+
 from logging import NullHandler
 except ImportError:
-    class NullHandler(logging.Handler):
+__version__ = "4.0.0"
        def emit(self, record):
            pass
 if sys.version_info[0] == 2:
    warnings.warn(
        "Python 2.x support of vcrpy is deprecated and will be removed in an upcoming major release.",
        DeprecationWarning,
    )
 logging.getLogger(__name__).addHandler(NullHandler())
--- a/vcr/cassette.py
+++ b/vcr/cassette.py
@@ -1,4 +1,5 @@
 import collections
 import contextlib
 import copy
 import sys
 import inspect
@@ -6,13 +7,13 @@ import logging
 import wrapt
 from .compat import contextlib
 from .errors import UnhandledHTTPRequestError
 from .matchers import requests_match, uri, method, get_matchers_results
 from .patch import CassettePatcherBuilder
 from .serializers import yamlserializer
 from .persisters.filesystem import FilesystemPersister
 from .util import partition_dict
 from ._handle_coroutine import handle_coroutine
 try:
    from asyncio import iscoroutinefunction
@@ -22,18 +23,10 @@ except ImportError:
        return False
 if sys.version_info[:2] >= (3, 5):
    from ._handle_coroutine import handle_coroutine
 else:
    def handle_coroutine(*args, **kwags):
        raise NotImplementedError("Not implemented on Python 2")
 log = logging.getLogger(__name__)
-class CassetteContextDecorator(object):
+class CassetteContextDecorator:
    """Context manager/decorator that handles installing the cassette and
    removing cassettes.
@@ -159,7 +152,7 @@ class CassetteContextDecorator(object):
        return new_args_getter
-class Cassette(object):
+class Cassette:
    """A container for recorded requests and responses"""
    @classmethod
--- a/vcr/compat.py
+++ b/vcr/compat.py
@@ -1,14 +0,0 @@
 try:
    from unittest import mock
 except ImportError:
    import mock
 try:
    import contextlib
 except ImportError:
    import contextlib2 as contextlib
 else:
    if not hasattr(contextlib, "ExitStack"):
        import contextlib2 as contextlib
 __all__ = ["mock", "contextlib"]
--- a/vcr/config.py
+++ b/vcr/config.py
@@ -1,9 +1,6 @@
 import copy
-try:
+from collections import abc as collections_abc
    from collections import abc as collections_abc  # only works on python 3.3+
 except ImportError:
    import collections as collections_abc
 import functools
 import inspect
 import os
@@ -19,7 +16,7 @@ from . import matchers
 from . import filters
-class VCR(object):
+class VCR:
    @staticmethod
    def is_test_method(method_name, function):
        return method_name.startswith("test") and isinstance(function, types.FunctionType)
@@ -102,7 +99,7 @@ class VCR(object):
        return matchers
    def use_cassette(self, path=None, **kwargs):
-        if path is not None and not isinstance(path, six.string_types):
+        if path is not None and not isinstance(path, str):
            function = path
            # Assume this is an attempt to decorate a function
            return self._use_cassette(**kwargs)(function)
@@ -251,4 +248,5 @@ class VCR(object):
    def test_case(self, predicate=None):
        predicate = predicate or self.is_test_method
        # TODO: Remove this reference to `six` in favor of the Python3 equivalent
        return six.with_metaclass(auto_decorate(self.use_cassette, predicate))
--- a/vcr/errors.py
+++ b/vcr/errors.py
@@ -3,7 +3,7 @@ class CannotOverwriteExistingCassetteException(Exception):
        self.cassette = kwargs["cassette"]
        self.failed_request = kwargs["failed_request"]
        message = self._get_message(kwargs["cassette"], kwargs["failed_request"])
-        super(CannotOverwriteExistingCassetteException, self).__init__(message)
+        super().__init__(message)
    @staticmethod
    def _get_message(cassette, failed_request):
--- a/vcr/filters.py
+++ b/vcr/filters.py
@@ -1,5 +1,5 @@
-from six import BytesIO, text_type
+from io import BytesIO
-from six.moves.urllib.parse import urlparse, urlencode, urlunparse
+from urllib.parse import urlparse, urlencode, urlunparse
 import copy
 import json
 import zlib
@@ -8,13 +8,11 @@ from .util import CaseInsensitiveDict
 def replace_headers(request, replacements):
-    """
+    """Replace headers in request according to replacements.
-    Replace headers in request according to replacements. The replacements
+    The replacements should be a list of (key, value) pairs where the value can be any of:
    should be a list of (key, value) pairs where the value can be any of:
    1. A simple replacement string value.
    2. None to remove the given header.
-      3. A callable which accepts (key, value, request) and returns a string
+    3. A callable which accepts (key, value, request) and returns a string value or None.
         value or None.
    """
    new_headers = request.headers.copy()
    for k, rv in replacements:
@@ -37,10 +35,9 @@ def remove_headers(request, headers_to_remove):
 def replace_query_parameters(request, replacements):
-    """
+    """Replace query parameters in request according to replacements.
-    Replace query parameters in request according to replacements. The
+
-    replacements should be a list of (key, value) pairs where the value can be
+    The replacements should be a list of (key, value) pairs where the value can be any of:
    any of:
      1. A simple replacement string value.
      2. None to remove the given header.
      3. A callable which accepts (key, value, request) and returns a string
@@ -73,10 +70,9 @@ def remove_query_parameters(request, query_parameters_to_remove):
 def replace_post_data_parameters(request, replacements):
-    """
+    """Replace post data in request--either form data or json--according to replacements.
-    Replace post data in request--either form data or json--according to
+
-    replacements. The replacements should be a list of (key, value) pairs where
+    The replacements should be a list of (key, value) pairs where the value can be any of:
    the value can be any of:
      1. A simple replacement string value.
      2. None to remove the given header.
      3. A callable which accepts (key, value, request) and returns a string
@@ -99,7 +95,7 @@ def replace_post_data_parameters(request, replacements):
                        json_data[k] = rv
            request.body = json.dumps(json_data).encode("utf-8")
        else:
-            if isinstance(request.body, text_type):
+            if isinstance(request.body, str):
                request.body = request.body.encode("utf-8")
            splits = [p.partition(b"=") for p in request.body.split(b"&")]
            new_splits = []
--- a/vcr/matchers.py
+++ b/vcr/matchers.py
@@ -1,5 +1,6 @@
 import json
-from six.moves import urllib, xmlrpc_client
+import urllib
 import xmlrpc.client
 from .util import read_body
 import logging
@@ -77,7 +78,7 @@ _checker_transformer_pairs = (
        lambda body: urllib.parse.parse_qs(body.decode("ascii")),
    ),
    (_header_checker("application/json"), _transform_json),
-    (lambda request: _xml_header_checker(request) and _xmlrpc_header_checker(request), xmlrpc_client.loads),
+    (lambda request: _xml_header_checker(request) and _xmlrpc_header_checker(request), xmlrpc.client.loads),
 )
--- a/vcr/patch.py
+++ b/vcr/patch.py
@@ -1,10 +1,11 @@
 """Utilities for patching in cassettes"""
 import contextlib
 import functools
 import itertools
 import mock
 from .compat import contextlib, mock
 from .stubs import VCRHTTPConnection, VCRHTTPSConnection
-from six.moves import http_client as httplib
+import http.client as httplib
 import logging
@@ -93,7 +94,7 @@ else:
    _AiohttpClientSessionRequest = aiohttp.client.ClientSession._request
-class CassettePatcherBuilder(object):
+class CassettePatcherBuilder:
    def _build_patchers_from_mock_triples_decorator(function):
        @functools.wraps(function)
        def wrapped(self, *args, **kwargs):
@@ -358,7 +359,7 @@ class CassettePatcherBuilder(object):
        )
-class ConnectionRemover(object):
+class ConnectionRemover:
    def __init__(self, connection_class):
        self._connection_class = connection_class
        self._connection_pool_to_connections = {}
--- a/vcr/persisters/filesystem.py
+++ b/vcr/persisters/filesystem.py
@@ -4,13 +4,13 @@ import os
 from ..serialize import serialize, deserialize
-class FilesystemPersister(object):
+class FilesystemPersister:
    @classmethod
    def load_cassette(cls, cassette_path, serializer):
        try:
            with open(cassette_path) as f:
                cassette_content = f.read()
-        except IOError:
+        except OSError:
            raise ValueError("Cassette not found.")
        cassette = deserialize(cassette_content, serializer)
        return cassette
--- a/vcr/request.py
+++ b/vcr/request.py
@@ -1,13 +1,13 @@
 import warnings
-from six import BytesIO, text_type
+from io import BytesIO
-from six.moves.urllib.parse import urlparse, parse_qsl
+from urllib.parse import urlparse, parse_qsl
 from .util import CaseInsensitiveDict
 import logging
 log = logging.getLogger(__name__)
-class Request(object):
+class Request:
    """
    VCR's representation of a request.
    """
@@ -39,7 +39,7 @@ class Request(object):
    @body.setter
    def body(self, value):
-        if isinstance(value, text_type):
+        if isinstance(value, str):
            value = value.encode("utf-8")
        self._body = value
@@ -136,4 +136,4 @@ class HeadersDict(CaseInsensitiveDict):
        if old:
            key = old[0]
-        super(HeadersDict, self).__setitem__(key, value)
+        super().__setitem__(key, value)
--- a/vcr/serializers/compat.py
+++ b/vcr/serializers/compat.py
@@ -1,6 +1,3 @@
 import six
 def convert_to_bytes(resp):
    resp = convert_body_to_bytes(resp)
    return resp
@@ -24,7 +21,7 @@ def convert_body_to_bytes(resp):
    http://pyyaml.org/wiki/PyYAMLDocumentation#Python3support
    """
    try:
-        if resp["body"]["string"] is not None and not isinstance(resp["body"]["string"], six.binary_type):
+        if resp["body"]["string"] is not None and not isinstance(resp["body"]["string"], bytes):
            resp["body"]["string"] = resp["body"]["string"].encode("utf-8")
    except (KeyError, TypeError, UnicodeEncodeError):
        # The thing we were converting either wasn't a dictionary or didn't
@@ -44,7 +41,7 @@ def _convert_string_to_unicode(string):
    result = string
    try:
-        if string is not None and not isinstance(string, six.text_type):
+        if string is not None and not isinstance(string, str):
            result = string.decode("utf-8")
    except (TypeError, UnicodeDecodeError, AttributeError):
        # Sometimes the string actually is binary or StringIO object,
--- a/vcr/stubs/init.py
+++ b/vcr/stubs/init.py
@@ -1,9 +1,12 @@
 """Stubs for patching HTTP and HTTPS requests"""
 import logging
-import six
+from http.client import (
-from six.moves.http_client import HTTPConnection, HTTPSConnection, HTTPResponse
+    HTTPConnection,
-from six import BytesIO
+    HTTPSConnection,
    HTTPResponse,
 )
 from io import BytesIO
 from vcr.request import Request
 from vcr.errors import CannotOverwriteExistingCassetteException
 from . import compat
@@ -11,7 +14,7 @@ from . import compat
 log = logging.getLogger(__name__)
-class VCRFakeSocket(object):
+class VCRFakeSocket:
    """
    A socket that doesn't do anything!
    Used when playing back cassettes, when there
@@ -143,7 +146,7 @@ class VCRHTTPResponse(HTTPResponse):
        return self._content.readable()
-class VCRConnection(object):
+class VCRConnection:
    # A reference to the cassette that's currently being patched in
    cassette = None
@@ -296,7 +299,6 @@ class VCRConnection(object):
            self.real_connection.sock = value
    def __init__(self, *args, **kwargs):
        if six.PY3:
        kwargs.pop("strict", None)  # apparently this is gone in py3
        # need to temporarily reset here because the real connection
@@ -328,7 +330,7 @@ class VCRConnection(object):
            # we're setting the real_connection itself for the first time
            pass
-        super(VCRConnection, self).__setattr__(name, value)
+        super().__setattr__(name, value)
    def __getattr__(self, name):
        """
@@ -340,7 +342,7 @@ class VCRConnection(object):
            # we're setting the real_connection itself for the first time
            return getattr(self.real_connection, name)
-        return super(VCRConnection, self).__getattr__(name)
+        return super().__getattr__(name)
 for k, v in HTTPConnection.__dict__.items():
--- a/vcr/stubs/aiohttp_stubs/init.py
+++ b/vcr/stubs/aiohttp_stubs/init.py
@@ -1,6 +1,4 @@
 """Stubs for aiohttp HTTP clients"""
 from __future__ import absolute_import
 import asyncio
 import functools
 import logging
--- a/vcr/stubs/boto3_stubs.py
+++ b/vcr/stubs/boto3_stubs.py
@@ -1,6 +1,4 @@
 """Stubs for boto3"""
 import six
 try:
    # boto using awsrequest
    from botocore.awsrequest import AWSHTTPConnection as HTTPConnection
@@ -26,8 +24,7 @@ class VCRRequestsHTTPSConnection(VCRHTTPSConnection, VerifiedHTTPSConnection):
    _baseclass = VerifiedHTTPSConnection
    def __init__(self, *args, **kwargs):
-        if six.PY3:
+        kwargs.pop("strict", None)
            kwargs.pop("strict", None)  # apparently this is gone in py3
        # need to temporarily reset here because the real connection
        # inherits from the thing that we are mocking out.  Take out
--- a/vcr/stubs/compat.py
+++ b/vcr/stubs/compat.py
@@ -1,11 +1,5 @@
-import six
+from io import BytesIO
 from six import BytesIO
 from six.moves.http_client import HTTPMessage
 try:
 import http.client
 except ImportError:
    pass
 """
@@ -15,10 +9,7 @@ layer that tries to cope with this move.
 def get_header(message, name):
    if six.PY3:
    return message.getallmatchingheaders(name)
    else:
        return message.getheader(name)
 def get_header_items(message):
@@ -29,16 +20,8 @@ def get_header_items(message):
 def get_headers(message):
    for key in set(message.keys()):
        if six.PY3:
        yield key, message.get_all(key)
        else:
            yield key, message.getheaders(key)
 def get_httpmessage(headers):
    if six.PY3:
    return http.client.parse_headers(BytesIO(headers))
    msg = HTTPMessage(BytesIO(headers))
    msg.fp.seek(0)
    msg.readheaders()
    return msg
--- a/vcr/stubs/tornado_stubs.py
+++ b/vcr/stubs/tornado_stubs.py
@@ -1,8 +1,6 @@
 """Stubs for tornado HTTP clients"""
 from __future__ import absolute_import
 import functools
-from six import BytesIO
+from io import BytesIO
 from tornado import httputil
 from tornado.httpclient import HTTPResponse
--- a/vcr/util.py
+++ b/vcr/util.py
@@ -107,12 +107,12 @@ def auto_decorate(decorator, predicate=lambda name, value: isinstance(value, typ
    class DecorateAll(type):
        def __setattr__(cls, attribute, value):
-            return super(DecorateAll, cls).__setattr__(attribute, maybe_decorate(attribute, value))
+            return super().__setattr__(attribute, maybe_decorate(attribute, value))
        def __new__(cls, name, bases, attributes_dict):
            new_attributes_dict = {
                attribute: maybe_decorate(attribute, value) for attribute, value in attributes_dict.items()
            }
-            return super(DecorateAll, cls).__new__(cls, name, bases, new_attributes_dict)
+            return super().__new__(cls, name, bases, new_attributes_dict)
    return DecorateAll