python進階路線，python進階之裝飾器之5把裝飾器作用到類和靜態方法上

#學習本章知識，需要理解裝飾器的調用順序，理解@classmethod @staticmethod

import time
from functools import wraps# A simple decorator
def timethis(func):@wraps(func)def wrapper(*args, **kwargs):start = time.time()r = func(*args, **kwargs)end = time.time()print(end-start)return rreturn wrapper# Class illustrating application of the decorator to different kinds of methods
class Spam:@timethisdef instance_method(self, n):print(self, n)while n > 0:n -= 1@classmethod@timethisdef class_method(cls, n):print(cls, n)while n > 0:n -= 1@staticmethod@timethisdef static_method(n):print(n)while n > 0:n -= 1
s = Spam()
print(s.instance_method(1000000))
# <__main__.Spam object at 0x1006a6050> 1000000
# 0.11817407608032227
print(Spam.class_method(1000000))
# <class '__main__.Spam'> 1000000
# 0.11334395408630371
print(Spam.static_method(1000000))
# 1000000
# 0.11740279197692871

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