is there a way to track the number of times a function is called?

Question

So i\'m trying to make a function that keeps track how many times a method is called. for example:

a = [1,2,3,4]
a.pop()

i want to know how

Answer 1

You could use a decorator that tracks how many times the function is called. Since list is a built-in, you can't decorate or replace its pop method so you'd have to use your own list class, for example.

def counted(f):
    def wrapped(*args, **kwargs):
        wrapped.calls += 1
        return f(*args, **kwargs)
    wrapped.calls = 0
    return wrapped

class MyList(list):
    @counted
    def pop(self, *args, **kwargs):
        return list.pop(self, *args, **kwargs)

x = MyList([1, 2, 3, 4, 5])
for i in range(3):
    x.pop()

print x.pop.calls # prints 3