在 Python3中 ：
import typesimport functoolsdef copy_func(f): """based on http://stackoverflow.com/a/6528148/190597 (Glenn Maynard)""" g = types.FunctionType(f.__pre__, f.__globals__, name=f.__name__, argdefs=f.__defaults__, closure=f.__closure__) g = functools.update_wrapper(g, f) g.__kwdefaults__ = f.__kwdefaults__ return gdef f(arg1, arg2, arg3, kwarg1="FOO", *args, kwarg2="BAR", kwarg3="BAZ"): return (arg1, arg2, arg3, args, kwarg1, kwarg2, kwarg3)f.cache = [1,2,3]g = copy_func(f)print(f(1,2,3,4,5))print(g(1,2,3,4,5))print(g.cache)assert f is not g
产量
(1, 2, 3, (5,), 4, 'BAR', 'BAZ')(1, 2, 3, (5,), 4, 'BAR', 'BAZ')[1, 2, 3]
在 Python2中 ：
import typesimport functoolsdef copy_func(f): """based on http://stackoverflow.com/a/6528148/190597 (Glenn Maynard)""" g = types.FunctionType(f.func_pre, f.func_globals, name=f.func_name, argdefs=f.func_defaults, closure=f.func_closure) g = functools.update_wrapper(g, f) return gdef f(x, y=2): return x,yf.cache = [1,2,3]g = copy_func(f)print(f(1))print(g(1))print(g.cache)assert f is not g
产量
(1, 2)(1, 2)[1, 2, 3]
