c* files done

montefra · montefra · commit 8fbb652bf4eb · 2015-03-04T23:48:30.000+01:00
diff --git a/lib/matplotlib/contour.py b/lib/matplotlib/contour.py
@@ -857,10 +857,12 @@ def __init__(self, ax, *args, **kwargs):
         else:
             self.logscale = False
 
-        if self.origin is not None:
-            assert(self.origin in ['lower', 'upper', 'image'])
-        if self.extent is not None:
-            assert(len(self.extent) == 4)
+        if self.origin not in [None, 'lower', 'upper', 'image']:
+            raise ValueError("If given, *origin* must be one of ['lower', \
+                    'upper', 'image']")
+        if self.extent is not None and len(self.extent) != 4:
+            raise ValueError("If give, *extent* must be '[ *None* | \
+            (x0,x1,y0,y1) ]'")
         if self.colors is not None and cmap is not None:
             raise ValueError('Either colors or cmap must be None')
         if self.origin == 'image':
