我正在寻找一种方法来检查 Python 中给定函数接受的参数数量。目的是实现一种更健壮的方法来修补我的类以进行测试。所以,我想做这样的事情:
class MyClass (object):
def my_function(self, arg1, arg2):
result = ... # Something complicated
return result
def patch(object, func_name, replacement_func):
import new
orig_func = getattr(object, func_name)
replacement_func = new.instancemethod(replacement_func,
object, object.__class__)
# ...
# Verify that orig_func and replacement_func have the
# same signature. If not, raise an error.
# ...
setattr(object, func_name, replacement_func)
my_patched_object = MyClass()
patch(my_patched_object, "my_function", lambda self, arg1: "dummy result")
# The above line should raise an error!
Thanks.
inspect.getargspec
在 Python 3 中已弃用。请考虑以下内容:
import inspect
len(inspect.signature(foo_func).parameters)
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