auto save

diy2.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!")
+    print("用户名和密码错误!请重新输入")
+    if 
+
+
+
+
+
+
+print("欢迎来到贝尔编程!")
\ No newline at end of file

diy3.py

+username = "python"
+userpassword = "123456"
+while True:
+    username1=input("输入用户名")
+    password1 = input("请输入密码:")
+    if username1==username and password1==userpassword: 
+        break
+    print("输入错误，请重新输入")
+    if username1!=username:
+        print("用户名输入错误，请重新输入")
+    if  password1!=userpassword: 
+        print("密码输入错误，请重新输入")      
+print("欢迎来到贝尔编程")    
+