hgext/convert/darcs.py

--- a/hgext/convert/darcs.py	Tue Jun 23 22:38:21 2015 -0700
+++ b/hgext/convert/darcs.py	Tue Jun 23 22:20:08 2015 -0700
@@ -197,7 +197,7 @@
         try:
             data = util.readfile(path)
             mode = os.lstat(path).st_mode
-        except IOError, inst:
+        except IOError as inst:
             if inst.errno == errno.ENOENT:
                 return None, None
             raise