Merge pull request #2057 from tacaswell/animation_pep8

pep8 fixes in animation.py

Author: pelson

lib/matplotlib/animation.py

@@ -29,7 +29,9 @@
 # * http://pymedia.org/
 # * libmng (produces swf) python wrappers: https://github.com/libming/libming
 # * Wrap x264 API:
-# http://stackoverflow.com/questions/2940671/how-to-encode-series-of-images-into-h264-using-x264-api-c-c
+
+# (http://stackoverflow.com/questions/2940671/
+# how-to-encode-series-of-images-into-h264-using-x264-api-c-c )
 
 
 # A registry for available MovieWriter classes
@@ -83,7 +85,7 @@ class MovieWriter(object):
         The format used in writing frame data, defaults to 'rgba'
     '''
     def __init__(self, fps=5, codec=None, bitrate=None, extra_args=None,
-            metadata=None):
+                 metadata=None):
         '''
         Construct a new MovieWriter object.
 
@@ -199,11 +201,12 @@ def grab_frame(self, **savefig_kwargs):
             # Tell the figure to save its data to the sink, using the
             # frame format and dpi.
             self.fig.savefig(self._frame_sink(), format=self.frame_format,
-                dpi=self.dpi, **savefig_kwargs)
+                             dpi=self.dpi, **savefig_kwargs)
         except RuntimeError:
             out, err = self._proc.communicate()
-            verbose.report('MovieWriter -- Error running proc:\n%s\n%s' % (out,
-                err), level='helpful')
+            verbose.report('MovieWriter -- Error '
+                           'running proc:\n%s\n%s' % (out,
+                                                      err), level='helpful')
             raise
 
     def _frame_sink(self):
@@ -217,10 +220,10 @@ def _args(self):
     def cleanup(self):
         'Clean-up and collect the process used to write the movie file.'
         out, err = self._proc.communicate()
-        verbose.report('MovieWriter -- Command stdout:\n%s' % out,
-            level='debug')
-        verbose.report('MovieWriter -- Command stderr:\n%s' % err,
-            level='debug')
+        verbose.report('MovieWriter -- '
+                       'Command stdout:\n%s' % out, level='debug')
+        verbose.report('MovieWriter -- '
+                       'Command stderr:\n%s' % err, level='debug')
 
     @classmethod
     def bin_path(cls):
@@ -238,8 +241,10 @@ def isAvailable(cls):
         running the commandline tool.
         '''
         try:
-            subprocess.Popen(cls.bin_path(), shell=False,
-                stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+            subprocess.Popen(cls.bin_path(),
+                             shell=False,
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE)
             return True
         except OSError:
             return False
@@ -307,7 +312,7 @@ def _frame_sink(self):
         self._temp_names.append(fname)
         verbose.report(
             'FileMovieWriter.frame_sink: saving frame %d to fname=%s' %
-                (self._frame_counter, fname),
+            (self._frame_counter, fname),
             level='debug')
         self._frame_counter += 1  # Ensures each created name is 'unique'
 
@@ -325,8 +330,8 @@ def finish(self):
         # the process here, rather than having an open pipe.
         if self._proc.returncode:
             raise RuntimeError('Error creating movie, return code: '
-                    + str(self._proc.returncode)
-                    + ' Try running with --verbose-debug')
+                               + str(self._proc.returncode)
+                               + ' Try running with --verbose-debug')
 
     def cleanup(self):
         MovieWriter.cleanup(self)
@@ -405,6 +410,7 @@ class AVConvBase(FFMpegBase):
 class AVConvWriter(AVConvBase, FFMpegWriter):
     pass
 
+
 # Combine AVConv options with file-based writing
 @writers.register('avconv_file')
 class AVConvFileWriter(AVConvBase, FFMpegFileWriter):
@@ -420,7 +426,7 @@ class MencoderBase:
     # Mencoder only allows certain keys, other ones cause the program
     # to fail.
     allowed_metadata = ['name', 'artist', 'genre', 'subject', 'copyright',
-            'srcform', 'comment']
+                        'srcform', 'comment']
 
     # Mencoder mandates using name, but 'title' works better with ffmpeg.
     # If we find it, just put it's value into name
@@ -439,8 +445,8 @@ def output_args(self):
             args.extend(self.extra_args)
         if self.metadata:
             args.extend(['-info', ':'.join('%s=%s' % (k, v)
-                for k, v in self.metadata.items()
-                if k in self.allowed_metadata)])
+                         for k, v in self.metadata.items()
+                         if k in self.allowed_metadata)])
         return args
 
 
@@ -451,9 +457,9 @@ def _args(self):
         # Returns the command line parameters for subprocess to use
         # mencoder to create a movie
         return [self.bin_path(), '-', '-demuxer', 'rawvideo', '-rawvideo',
-            ('w=%i:h=%i:' % self.frame_size +
-            'fps=%i:format=%s' % (self.fps,
-                                  self.frame_format))] + self.output_args
+                ('w=%i:h=%i:' % self.frame_size +
+                'fps=%i:format=%s' % (self.fps,
+                                      self.frame_format))] + self.output_args
 
 
 # Combine Mencoder options with temp file-based writing
@@ -465,10 +471,10 @@ def _args(self):
         # Returns the command line parameters for subprocess to use
         # mencoder to create a movie
         return [self.bin_path(),
-            'mf://%s*.%s' % (self.temp_prefix, self.frame_format),
-            '-frames', str(self._frame_counter), '-mf',
-            'type=%s:fps=%d' % (self.frame_format,
-                                self.fps)] + self.output_args
+                'mf://%s*.%s' % (self.temp_prefix, self.frame_format),
+                '-frames', str(self._frame_counter), '-mf',
+                'type=%s:fps=%d' % (self.frame_format,
+                                    self.fps)] + self.output_args
 
 
 # Base class for animated GIFs with convert utility
@@ -622,21 +628,26 @@ def save(self, filename, writer=None, fps=None, dpi=None, codec=None,
         if savefig_kwargs is None:
             savefig_kwargs = {}
 
-        # FIXME: Using 'bbox_inches' doesn't currently work with writers that pipe
-        # the data to the command because this requires a fixed frame size (see
-        # Ryan May's reply in this thread: [1]). Thus we drop the 'bbox_inches'
-        # argument if it exists in savefig_kwargs.
+        # FIXME: Using 'bbox_inches' doesn't currently work with
+        # writers that pipe the data to the command because this
+        # requires a fixed frame size (see Ryan May's reply in this
+        # thread: [1]). Thus we drop the 'bbox_inches' argument if it
+        # exists in savefig_kwargs.
         #
-        # [1] http://matplotlib.1069221.n5.nabble.com/Animation-class-let-save-accept-kwargs-which-are-passed-on-to-savefig-td39627.html
+        # [1] (http://matplotlib.1069221.n5.nabble.com/
+        # Animation-class-let-save-accept-kwargs-which-
+        # are-passed-on-to-savefig-td39627.html)
         #
-        if savefig_kwargs.has_key('bbox_inches'):
+        if 'bbox_inches' in savefig_kwargs:
             if not (writer in ['ffmpeg_file', 'mencoder_file'] or
-                    isinstance(writer, (FFMpegFileWriter, MencoderFileWriter))):
-                print("Warning: discarding the 'bbox_inches' argument in " \
-                          "'savefig_kwargs' as it is only currently supported " \
-                          "with the writers 'ffmpeg_file' and 'mencoder_file' " \
-                          "(writer used: '{}').".format(writer if isinstance(writer, str)
-                                                        else writer.__class__.__name__))
+                    isinstance(writer,
+                               (FFMpegFileWriter, MencoderFileWriter))):
+                print("Warning: discarding the 'bbox_inches' argument in "
+                      "'savefig_kwargs' as it is only currently supported "
+                      "with the writers 'ffmpeg_file' and 'mencoder_file' "
+                      "(writer used: "
+                      "'{}').".format(writer if isinstance(writer, str)
+                                      else writer.__class__.__name__))
                 savefig_kwargs.pop('bbox_inches')
 
         # Need to disconnect the first draw callback, since we'll be doing
@@ -677,7 +688,8 @@ def save(self, filename, writer=None, fps=None, dpi=None, codec=None,
         if is_string_like(writer):
             if writer in writers.avail:
                 writer = writers[writer](fps, codec, bitrate,
-                    extra_args=extra_args, metadata=metadata)
+                                         extra_args=extra_args,
+                                         metadata=metadata)
             else:
                 import warnings
                 warnings.warn("MovieWriter %s unavailable" % writer)
@@ -708,7 +720,7 @@ def save(self, filename, writer=None, fps=None, dpi=None, codec=None,
         # Reconnect signal for first draw if necessary
         if reconnect_first_draw:
             self._first_draw_id = self._fig.canvas.mpl_connect('draw_event',
-                self._start)
+                                                               self._start)
 
     def _step(self, *args):
         '''
@@ -756,7 +768,7 @@ def _pre_draw(self, framedata, blit):
     def _draw_frame(self, framedata):
         # Performs actual drawing of the frame.
         raise NotImplementedError('Needs to be implemented by subclasses to'
-            ' actually make an animation.')
+                                  ' actually make an animation.')
 
     def _post_draw(self, framedata, blit):
         # After the frame is rendered, this handles the actual flushing of
@@ -799,7 +811,7 @@ def _setup_blit(self):
         self._blit_cache = dict()
         self._drawn_artists = []
         self._resize_id = self._fig.canvas.mpl_connect('resize_event',
-            self._handle_resize)
+                                                       self._handle_resize)
         self._post_draw(None, self._blit)
 
     def _handle_resize(self, *args):
@@ -821,7 +833,7 @@ def _end_redraw(self, evt):
         self.event_source.start()
         self._fig.canvas.mpl_disconnect(self._resize_id)
         self._resize_id = self._fig.canvas.mpl_connect('resize_event',
-            self._handle_resize)
+                                                       self._handle_resize)
 
 
 class TimedAnimation(Animation):
@@ -836,7 +848,7 @@ class TimedAnimation(Animation):
     the animation.
     '''
     def __init__(self, fig, interval=200, repeat_delay=None, repeat=True,
-            event_source=None, *args, **kwargs):
+                 event_source=None, *args, **kwargs):
         # Store the timing information
         self._interval = interval
         self._repeat_delay = repeat_delay
@@ -952,13 +964,13 @@ class FuncAnimation(TimedAnimation):
 
     *init_func* is a function used to draw a clear frame. If not given, the
     results of drawing from the first item in the frames sequence will be
-    used. This function will be called once before the first frame. 
+    used. This function will be called once before the first frame.
 
     If blit=True, *func* and *init_func* should return an iterable of
     drawables to clear.
     '''
     def __init__(self, fig, func, frames=None, init_func=None, fargs=None,
-            save_count=None, **kwargs):
+                 save_count=None, **kwargs):
         if fargs:
             self._args = fargs
         else:

lib/matplotlib/tests/test_coding_standards.py

@@ -16,7 +16,6 @@ class StandardReportWithExclusions(pep8.StandardReport):
         '*/matplotlib/_mathtext_data.py',
         '*/matplotlib/_pylab_helpers.py',
         '*/matplotlib/afm.py',
-        '*/matplotlib/animation.py',
         '*/matplotlib/artist.py',
         '*/matplotlib/axes.py',
         '*/matplotlib/axis.py',