save project

diy2.py

+i=3
 username = "python"
 userpassword = "123456"
 while True:
-    name = input("请输入用户名:")
-    if name==username:
-        password = input("请输入密码:")
-        if userpassword==password:
-            print("登录成功!")
-            break
+    if i>0:
+        name = input("请输入用户名:")
+        i=i-1
+        if name==username:
+            password = input("请输入密码:")
+            if userpassword==password:
+                print("登录成功!")
+                break
+            else:
+                print("密码输入有误，请重新输入")
         else:
-            print("密码输入有误，请重新输入")
-    else:
-        print("用户名不存在，请重新输入")
-     
-    
+            print("用户名不存在，请重新输入")
+        
+        
 print("欢迎来到贝尔编程!")
\ No newline at end of file