auto save

diy2.py

+username = "python"
+userpassword = "123456"
+ci = 3
+while True:
+    if ci>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        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")
+            continue
+        if password != userpassword:
+            print("密码错误呀~~请重新登录")
+    else:
+        print("恭喜你，用户名永久封闭")
+    # print("用户名和密码错误!请重新输入")
+print("欢迎来到贝尔编程!")
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