python将print输出的信息保留到日志文件中

print与stdout说明参见：

https://blog.csdn.net/he_and/article/details/80675070

https://www.jb51.net/article/171015.htm

 

import sys

import os

import io

import datetime

def create_detail_day():

    '''

    :return:

    '''

    # 年-月-日

    # daytime = datetime.datetime.now().strftime('day'+'%Y-%m-%d')

    # 年_月_日

    daytime = datetime.datetime.now().strftime('day'+'%Y_%m_%d')

    # 时：分：秒

    # hourtime = datetime.datetime.now().strftime("%H:%M:%S")

    # hourtime = datetime.datetime.now().strftime('time' + "%H_%M_%S")

    detail_time = daytime

    # print(daytime + "-" + hourtime)

    # detail_time = daytime + "__" + hourtime

    return detail_time

class Logger(object):

    def __init__(self, filename="Default.log", path="./"):

        sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='utf-8')

        self.terminal = sys.stdout

        self.log = open(os.path.join(path, filename), "a", encoding='utf8')

    def write(self, message):

        self.terminal.write(message)

        self.log.write(message)

    def flush(self):

        pass

if __name__ == '__main__':

    sys.stdout = Logger(create_detail_day() + '.log', path='')

    print(create_detail_day().center(60, '*'))

    print('explanation'.center(80, '*'))

    info1 = '从大到小排序'

    info2 = ' sort the form large to small'

    print(info1)

    print(info2)

    print('END: explanation'.center(80, '*'))