save project

diy1.py

 username ="yu"
 username ="yu"
 password="123456"
 password="123456"
-username2=input("请输入姓名")
-passpord2=input("请输入密码")
-if username==username2:
-    print("用户名正确")
+while True:
+    username2=input("请输入姓名")
+    password2=input("请输入密码")
+    if username==username2:
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+        print("用户名正确")
+        if password==password2:
+            print("密码正确！欢迎！")
+            break
+        else:
+            print("密码错误！请重新输入！")
+    else:
+        print("用户不存在！请重新输入！")
+print("欢迎"+username2+"登录")
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