Allow color=None to be passed to plotting functions.

smithsp · smithsp · commit b7aceb4c253e · 2014-11-26T14:22:37.000-08:00
diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
@@ -232,7 +232,7 @@ def _xy_from_xy(self, x, y):
 
     def _makeline(self, x, y, kw, kwargs):
         kw = kw.copy()  # Don't modify the original kw.
-        if 'color' not in kw and 'color' not in kwargs:
+        if kw.get('color',None) is None and kwargs.get('color',None) is None:
             kw['color'] = six.next(self.color_cycle)
             # (can't use setdefault because it always evaluates
             # its second argument)
