save project

diy2.py

+username = "123"
+userpassword = "123456"
+while True:
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1     #i=i-1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if name != username: 
+            print("print("用户名错误请重新输入") 
+        if password != userpassword:
+            print("密码错误!请重新输入") 
+        print("密码错误用户名错误请重新输入：") 
+    else:
+        print("滚！")
+        exit()
+print("欢迎来到贝尔编程!")
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