human
Here's a good function header given the following:
I wrote the below code

    @functools.wraps(fn)
    def wrapper(*args, **kwargs):
        counter(('%s_calls' % get_qualname(fn))).inc()
        return fn(*args, **kwargs)
    return wrapper

What's a good function header?
assistant
#Here's a good function header.

def count_calls(fn):