save project

diy2.py

+i=0
+username = "python"
+userpassword = "123456"
+while True:
+    if i<3:
+        name = input("请输入用户名")
+        password = input("请输入密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        elif name!=username:
+            print("用户名不存在，请重新输入")
+        else: 
+            print("密码错误，请重新输入")
+    else:
+        print("您的帐户已锁定,拿着身份证,请到我司来领您的银行卡")
+        exit
+print("欢迎来到贝尔编程!")
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