log the duration of calling function

timeit.py

import time
from functools import wraps

def timeit(method):
    @wraps(method)
    def timed(*args, **kw):
        ts = time.time()
        result = method(*args, **kw)
        te = time.time()
        print(
            "timeit: %r (%r, %r) duration: %s sec"
            % (method.__name__, args, kw, te - ts)
        )
        return result

    return timed