# clockdeco1.py
import time

def clock(func):
    def clocked(*args): #1 
        t0 = time.perf_counter()
        result = func(*args) #2
        elapsed = time.perf_counter() - t0
        name = func.__name__
        arg_str = ', '.join(repr(arg) for arg in args)
        print('[%0.8fs] %s(%s) -> %r' % (elapsed, name, arg_str, result)) return result
    return clocked #3

# clockdeco2.py
import time
import functools


def clock(func): 
    @functools.wraps(func)
    def clocked(*args, **kwargs):
        t0 = time.time()
        result = func(*args, **kwargs) elapsed = time.time() - t0 name = func.__name__
        arg_lst = []
        if args:
            arg_lst.append(', '.join(repr(arg) for arg in args))
        if kwargs:
            pairs = ['%s=%r' % (k, w) for k, w in sorted(kwargs.items())]
        arg_lst.append(', '.join(pairs))
        arg_str = ', '.join(arg_lst)
        print('[%0.8fs] %s(%s) -> %r ' % (elapsed, name, arg_str, result))
        return result
    return clocked