带参数装饰器指定⼀个⽤于输出的⽇志⽂件

from functools import wraps

def logit(logfile='out.log'):
    def logging_decorator(func):
        @wraps(func)
        def wrapped_function(*args,**kwargs):
            log_string = func.__name__ + "was called"
            print(log_string)
            #打开logfile 并写入内容
            with open(logfile,'a') as opened_file:
                #现在将日志打到指定的logfile
                opened_file.write(log_string +'\n')
        return wrapped_function
    return logging_decorator

@logit()
def myfunc1():
    pass
myfunc1()
# Output: myfunc1 was called
# 现在⼀个叫做 out.log 的⽂件出现了，⾥⾯的内容就是上⾯的字符串
@logit(logfile='func2.log')
def myfunc2():
    pass

myfunc2()
# Output: myfunc2 was called
# 现在⼀个叫做 func2.log 的⽂件出现了，⾥⾯的内容就是上⾯的字符串

引用自《Python进阶（Intermediate_Python）》