> >Q: The C idea of (pv != NULL) is said most directly in Python ctypes > >how? > > Perhaps reading the ctypes tutorial? (both in the 2.5 docs and in > <http://starship.python.net/crew/theller/ctypes/tutorial.html>)
Actually, no. I see three answers or zero, depending on how you like to count. Yes that flat edition helps makes this clear, thank you - there I can more easily grab an ordered list of all matches of text than in the more prominent shadow: http://docs.python.org/dev/lib/module-ctypes.html I see direct discussion only of how to construct null pointers, no discussion of how to test for them. Specifically: The hint { bool(null_ptr) == False } could be read to mean try == False, in the "Pointers" text. The hint { ("values", POINTER(c_int))] ... bar.values = None } could be read to say try == None, in the "Calling functions" text. The hint { if item.name is None } could be read to say try is None, in the "Accessing values exported from dlls" text. I'm such a Python newbie that I didn't know is None existed alongside == None. I guess I'll next dig into that along with the answer below from CTypes author Thomas Heller. -- http://mail.python.org/mailman/listinfo/python-list
