Add PixelSpinner, based on braille characters

README.rst

@@ -109,12 +109,13 @@ For actions with an unknown number of steps you can use a spinner:
         # Do some work
         spinner.next()
 
-There are 4 predefined spinners:
+There are 5 predefined spinners:
 
 - ``Spinner``
 - ``PieSpinner``
 - ``MoonSpinner``
 - ``LineSpinner``
+- ``PixelSpinner``
 
 
 Other

progress/spinner.py

@@ -39,3 +39,6 @@ class MoonSpinner(Spinner):
 
 class LineSpinner(Spinner):
     phases = ['⎺', '⎻', '⎼', '⎽', '⎼', '⎻']
+
+class PixelSpinner(Spinner):
+    phases = ['⣾','⣷', '⣯', '⣟', '⡿', '⢿', '⣻', '⣽']

test_progress.py

@@ -8,7 +8,8 @@ import time
 from progress.bar import (Bar, ChargingBar, FillingSquaresBar,
                           FillingCirclesBar, IncrementalBar, PixelBar,
                           ShadyBar)
-from progress.spinner import Spinner, PieSpinner, MoonSpinner, LineSpinner
+from progress.spinner import (Spinner, PieSpinner, MoonSpinner, LineSpinner,
+                              PixelSpinner)
 from progress.counter import Counter, Countdown, Stack, Pie
 
 
@@ -30,7 +31,7 @@ for bar_cls in (IncrementalBar, PixelBar, ShadyBar):
     for i in bar.iter(range(200)):
         sleep()
 
-for spin in (Spinner, PieSpinner, MoonSpinner, LineSpinner):
+for spin in (Spinner, PieSpinner, MoonSpinner, LineSpinner, PixelSpinner):
     for i in spin(spin.__name__ + ' ').iter(range(100)):
         sleep()
     print()