New submission from Florent Xicluna <florent.xicl...@gmail.com>: Now that callable() is back in 3.2, we may replace hasattr(obj, '__call__') with callable(obj).
The built-in function is easier to read and gives better performance than attribute lookup. $ ./python -m timeit "hasattr(None, '__call__')" 100000 loops, best of 3: 4.09 usec per loop $ ./python -m timeit "hasattr(str, '__call__')" 1000000 loops, best of 3: 1.3 usec per loop $ ./python -m timeit "callable(None)" 1000000 loops, best of 3: 0.299 usec per loop $ ./python -m timeit "callable(str)" 1000000 loops, best of 3: 0.369 usec per loop ---------- components: Library (Lib) messages: 146320 nosy: flox priority: normal severity: normal status: open title: replace hasattr(obj, '__call__') with callable(obj) type: performance versions: Python 3.2, Python 3.3 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue13258> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
