the only assert in a python public function removed

montefra · montefra · commit 4fc36c64dc0c · 2015-03-05T00:09:03.000+01:00
diff --git a/lib/matplotlib/tri/tripcolor.py b/lib/matplotlib/tri/tripcolor.py
@@ -138,7 +138,10 @@ def tripcolor(ax, *args, **kwargs):
     collection.set_alpha(alpha)
     collection.set_array(C)
     if norm is not None:
-        assert(isinstance(norm, Normalize))
+        if not isinstance(norm, Normalize):
+            msg = "'norm' must be an instance of"
+            msg += " 'Normalize'"
+            raise ValueError(msg)
     collection.set_cmap(cmap)
     collection.set_norm(norm)
     if vmin is not None or vmax is not None:
