1.函数
import sys
class Callcount01:
def __init__(self, func):
self.func = func
self.call_num = 0
def __call__(self, *args, **kwargs):
self.call_num += 1
print('self.call_num is: {} {}'.format(self.call_num, self.func.__name__)) #这是利用类装饰器的方法
return self.func(*args, **kwargs)
@Callcount01
def call_test():
print('----- in call_test, my func name: {}'.format(sys._getframe().f_code.co_name)) #这是第二种
call_test()
call_test()2. 函数运行时间计算和统计
# todo: record the real runtine by use this decorator
import time
import functools
def my_decorator(func):
print('begin my_decorator')
@functools.wraps(func)
def my_wrapper(*args, **kwargs):
print('begin my_wrapper')
start_time = time.perf_counter()
func(*args, **kwargs)
end_time = time.perf_counter()
print('function: {} , runtime: {} .'.format(func.__name__, (end_time - start_time)))
return my_wrapper
@my_decorator ### 定义函数前用这个装饰器装饰一下，可以统计函数的运行时间
def greet(name):
print('hello from greet: {}'.format(name))
time.sleep(3)
greet('xiaowei')
print(greet.__name__)
用一个例子来演示会更加清晰
