Don't clear Spines and Axis twice in Axes.__init__.

QuLogic · QuLogic · commit ad222a210f12 · 2017-05-15T04:27:26.000-04:00
Both these classes have called their own .cla() method in their
.__init__() method, so don't call it again in Axes.cla() if doing
Axes.__init__().
diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
@@ -537,7 +537,7 @@ def __init__(self, fig, rect,
             self._hold = True
 
         self._connected = {}  # a dict from events to (id, func)
-        self.cla()
+        self.cla(_init=True)
         # funcs used to format x and y - fall back on major formatters
         self.fmt_xdata = None
         self.fmt_ydata = None
@@ -952,7 +952,7 @@ def _gen_axes_spines(self, locations=None, offset=0.0, units='inches'):
             ('bottom', mspines.Spine.linear_spine(self, 'bottom')),
             ('top', mspines.Spine.linear_spine(self, 'top'))])
 
-    def cla(self):
+    def cla(self, _init=False):
         """Clear the current axes."""
         # Note: this is called by Axes.__init__()
 
@@ -965,10 +965,13 @@ def cla(self):
         xaxis_visible = self.xaxis.get_visible()
         yaxis_visible = self.yaxis.get_visible()
 
-        self.xaxis.cla()
-        self.yaxis.cla()
-        for name, spine in six.iteritems(self.spines):
-            spine.cla()
+        # Don't clear during __init__ because they're already been cleared by
+        # their own __init__.
+        if not _init:
+            self.xaxis.cla()
+            self.yaxis.cla()
+            for name, spine in six.iteritems(self.spines):
+                spine.cla()
 
         self.ignore_existing_data_limits = True
         self.callbacks = cbook.CallbackRegistry()
