auto save

01.py

+azh = "python"
+amm = "123456"
+while True:
+    zh = input("请输入用户名:")
+    mm = input("请输入密码:")
+    if zh == azh and mm == amm:
+        print("登录成功!")
+        break
+    if zh != azh:
+        print("用户名不存在,请重新输入!")
+    if mm != amm:
+        print("密码输入有误,请重新输入!")
+print("欢迎来到贝尔编程!")
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