Warn when using the Gtk3Agg backend on Python 3

mdboom · mdboom · commit 85ceba6eb891 · 2011-11-18T11:59:00.000-05:00
diff --git a/lib/matplotlib/backends/backend_gtk3agg.py b/lib/matplotlib/backends/backend_gtk3agg.py
@@ -1,11 +1,16 @@
 import cairo
 import numpy as np
+import sys
+import warnings
 
 import backend_agg
 import backend_gtk3
 from matplotlib.figure import Figure
 from matplotlib import transforms
 
+if sys.version_info[0] >= 3:
+    warnings.warn("The Gtk3Agg backend is not known to work on Python 3.x.")
+
 
 class FigureCanvasGTK3Agg(backend_gtk3.FigureCanvasGTK3,
                           backend_agg.FigureCanvasAgg):
