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()