auto save

l.py

+username = "oooo"
+userpassword = "777"
+i=3
+while True:
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i=i-1 
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        elif name != username:
+            print("用户名错误")
+        else:
+            print("密码错误")
+    else:
+        print("请五小时后重试")
+        exit()
+print("欢迎来到贝尔编程!")
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