auto save

1.py

+#初始账号:username="python"
+#初始密码:userpassword=123456
+username="python"
+userpassword="123456"
+# name=input("请输入账号:")
+# password=input("请输入密码:")
+while True:
+    name=input("请输入账号:")
+    password=input("请输入密码:")
+    if name==username and password==userpassword:
+        print("登陆成功")
+        break
+    if name!=username:
+        print("该用户不存在请重新输入")
+    if userpassword!=password:
+        print("密码输入有误，请重新输入")
+print("欢迎来到贝尔学院！")        

2.py

+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("用户名不存在,请重新输入!")
+    if password != userpassword:
+        print("密码输入有误,请重新输入!")
+print("欢迎来到贝尔编程!")
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