save project

diy2.py

+i=3
 username="yl"
 username="yl"
 userpassword="yyds"
 userpassword="yyds"
 while True:
 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
-    elif name!=username:
-        print("用户名错误")
-    else:
-        print("密码错误")
+    if i>0:
+        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
+        elif name!=username:
+            print("用户名错误")
+        else:
+            print("密码错误")
 print("欢迎来到YL宇宙")
 print("欢迎来到YL宇宙")