Add docstring to _setup_canvas()

dmcdougall · dmcdougall · commit f83fbc9424ef · 2012-09-02T18:01:06.000+01:00
diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py
@@ -331,8 +331,10 @@ def __init__(self,
         self._cachedRenderer = None
 
     def _setup_canvas(self):
-        # TODO: docstring
-        import matplotlib.backends as mbackends
+        """
+        Return the FigureCanvas instance defined by the currently loaded backend.
+        """
+        import matplotlib.backends as mbackends  # lazy import
         backend_mod = mbackends.pylab_setup()[0]
         return backend_mod.FigureCanvas(self)
 
