python 控制台输出的内容保存到txt 文件

import sys
class Logger(object):
    def __init__(self, fileN="Default.log"):
        self.terminal = sys.stdout
        self.log = open(fileN, "a")

    def write(self, message):
        self.terminal.write(message)
        self.log.write(message)

    def flush(self):
        pass


sys.stdout = Logger("D:\\12.txt")  # 保存到D盘
print('asfasfsaf')