auto save

1.py

+t1=int("123")
+print(t1+2)
+
+# #关卡3  重复执行判断用户名或密码不等于时...
+# username = "python"
+# userpassword = "123456"
+# while True:
+#     name = input("请输入用户名:")
+#     password = input("请输入密码:")
+#     if name == username and password == userpassword:
+#         print("登录成功!")
+#         break
+#     if name !=username:
+#         print("用户名错误")
+#         continue
+#     if password !=userpassword:
+#         print("密码错误")
+#         continue    
+
+# print("欢迎来到贝尔编程!")