函数获取自身的函数名字 + 函数运行时间计算和统计

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()

参考：https://www.cnblogs.com/dflblog/p/11399573.html

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__)