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add note about hack

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Kevin McCarthy
2014-05-10 11:35:09 -10:00
parent 483554ed2e
commit d7f7152dbf
1 changed files with 13 additions and 1 deletions
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14
vcr/migration.py
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@@ -31,7 +31,19 @@ except ImportError:
from yaml import Loader
def preprocess_yaml(cassette):
return cassette.replace(' !!python/object:vcr.request.Request', '').replace('!!python/object/apply:__builtin__.frozenset', '').replace('!!python/object/apply:builtins.frozenset', '')
# this is the hack that makes the whole thing work. The old version used
# to deserialize to Request objects automatically using pyYaml's !!python
# tag system. This made it difficult to deserialize old cassettes on new
# versions. So this just strips the tags before deserializing.
STRINGS_TO_NUKE = [
'!!python/object:vcr.request.Request',
'!!python/object/apply:__builtin__.frozenset',
'!!python/object/apply:builtins.frozenset',
]
for s in STRINGS_TO_NUKE:
cassette = cassette.replace(s, '')
return cassette
PARTS = [