save project

diy.py

+i=3
+username="python"
+userpassword="1233456"
+while True:
+    if i>0:
+    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!")
+        print("温馨提示：您还有"+str(i)+"次机会")
+        continue
+     else password != userpassword:
+        print("密码输入有误，请重新输入!")
+        print("温馨提示：您还有"+str(i)+"次机会")
+        exit()
+print("欢迎来到贝尔编程!") 
\ No newline at end of file