save project

diy2.py

 username = "python"
 userpassword = "123456"
+i=3
 while True:
-	name = input('请输入账号')
-	password = input('请输入密码')
-    if name == username and password == userpassword:
-        print('登录成功')
-        break
-    else:
-        if name != username:
-            print('账号错误')
-        if password != userpassword:
-            print('密码错误')
+    if i>0:
+        name = input('请输入账号')
+        password = input('请输入密码')
+        if name == username and password == userpassword:
+            print('登录成功')
+            break
+        else:
+            if name != username:
+                print('账号错误')
+                i-=1
+            if password != userpassword:
+                print('密码错误')
+                i-=1
 print('欢迎来到贝尔编程')