timeit.py

def timeit(what):
    def wrapper(fn):
        def wrapped(*args, **kwargs):
            start = datetime.datetime.now()
            rv = fn(*args, **kwargs)
            end = datetime.datetime.now()
            with open('/tmp/timeit', 'a') as f:
                f.write('%s start: %s' % (what, start.isoformat()))
                f.write('%s end: %s' % (what, end.isoformat()))
                f.write('\n\n')
            return rv
        return wrapped
    return wrapper