save project

diy2.py

+username = "python"
+userpassword = "123456"
+i = 3
+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
+        if name !=  username:
+            print("用户名不存在!请重新输入")
+            print("警告:您还有"+str(i)+"次机会")
+            continue
+        if password != userpassword:
+            print("密码错误!请重新输入")
+            print("警告:您还有"+str(i)+"次机会")
+    else:
+        print("已锁定~")
+        exit()
+print("欢迎来到贝尔编程!")