save project

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!")
+        break
+    if name != username
+        print("用户名错误!请重新输入")
+        continue
+    if  password!=userpassword 
+        print("用户名错误!请重新输入")
+        
+