Don't call sys.exit if objc can't be imported. It makes it impossible for nose to collect tests across all of matplotlib. Addresses matplotlib#571.

mdboom · mdboom · commit d021ef037c63 · 2011-12-06T13:56:23.000-05:00
diff --git a/lib/matplotlib/backends/backend_cocoaagg.py b/lib/matplotlib/backends/backend_cocoaagg.py
@@ -18,10 +18,8 @@
 
 try:
     import objc
-except:
-    print >>sys.stderr, 'The CococaAgg backend required PyObjC to be installed!'
-    print >>sys.stderr, '  (currently testing v1.3.7)'
-    sys.exit()
+except ImportError:
+    raise ImportError('The CococaAgg backend required PyObjC to be installed!')
 
 from Foundation import *
 from AppKit import *
