python结束程序的三种技巧

1. break

2.exit(0)

3.sys.exit(0)

 

 

import file_manager
import sys


def start():
    # try:
    #     with open(\'file/welcome.txt\',\'r\',encoding=\'utf8\') as f:
    #         content = f.read()
    #         while True:
    #             input(content)
    # except FileNotFoundError:
    #     print(\'文件未找到！\')
    content = file_manager.read_file(\'welcome.txt\')
    # file_manager.BASE_DIR = \'./xxx/\'
    # content = file_manager.read_file(\'sss.txt\')
    while True:
        operator = input(content + \'\n请输入（1-3：\')
        if operator == \'1\':
            print(\'注册\')
        elif operator == \'2\':
            print(\'登录\')
        elif operator == \'3\':
            print(\'退出\')
            # break   # 结束循环
            # exit(0)  # 退出整个程序
            sys.exit(0)  # 退出整个程序
        else:
            print(\'输入有误！\')


if __name__ == \'__main__\':
    start()