Georg Brandl wrote: > Greg Ewing schrieb: > >> Scott Dial wrote: >> >> A tangential question -- why are TemporaryFile and >> NamedTemporaryFile named in TitleCase, when they're >> functions and not classes? >> > > Probably because they are factory functions potentially returning a > _TemporaryFileWrapper. If they were "functions", they'd have to be > verbed, e.g. "make_temporary_file()". > > The class/function distinction is not so clear in Python from the user's > point of view since there is no different calling syntax. Actually the distinction is very clear:
>>> class _PrivateClass(object): ... pass ... >>> def FunctionNamedToLookLikeClass(): ... return _PrivateClass() ... >>> pc = _PrivateClass() >>> isinstance(pc, _PrivateClass) True >>> fntllc = FunctionNamedToLookLikeClass() >>> isinstance(fntllc, FunctionNamedToLookLikeClass) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: isinstance() arg 2 must be a class, type, or tuple of classes and types That's sure to be an unpleasant surprise for someone. -- Aaron Bingham Senior Software Engineer [EMAIL PROTECTED] Tel. +49 (0)351 4173-146 Fax +49 (0)351 4173-109 Cenix BioScience GmbH Tatzberg 47 01307 Dresden, Germany www.cenix-bioscience.com --------------------------------------------------------- Sitz der Gesellschaft (Place of Business): Dresden Geschäftsführer (CEO): Dr. Christophe J. Echeverri Amtsgericht (Local Court): Dresden, HRB 19964 Ust-ID (VAT-No.): DE205824437 --------------------------------------------------------- _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
