commit 5d1155c08edf7f53eca804b2b6538636c2dfe711
author Florent Xicluna <florent.xicluna@gmail.com> Fri Oct 28 14:45:05 2011 +0200
committer Florent Xicluna <florent.xicluna@gmail.com> Fri Oct 28 14:45:05 2011 +0200
tree dcb2cf857c20dce837c82de7aea432ccf9a41355
parent f99e4b5dbef57e13dd603dcc0edd9b7318f08c28

Closes #13258: Use callable() built-in in the standard library.

Lib/optparse.py

diff --git a/Lib/optparse.py b/Lib/optparse.py
index cbd019a..d97a1f7 100644
--- a/Lib/optparse.py
+++ b/Lib/optparse.py
@@ -705,7 +705,7 @@
 
     def _check_callback(self):
         if self.action == "callback":
-            if not hasattr(self.callback, '__call__'):
+            if not callable(self.callback):
                 raise OptionError(
                     "callback not callable: %r" % self.callback, self)
             if (self.callback_args is not None and