python中怎么判断函数是否可以调用?

Question

python中怎么判断函数是否可以调用

Answer 1

Python: 测试函数是否被调用

# helper class defined elsewhere
class CallLogger(object):
def __init__(self, meth):
self.meth = meth
self.was_called = False

def __call__(self, code=None):
self.meth()
self.was_called = True

然后assert CallLogger的was_called为True就行了。但是这样的Callable不是个函数：

isinstance(object, types.FunctionType) # Callable will be False

对于这种Callable获取参数个数需要用：

inspect.getargspec(fn.__call__)

Answer 2