auto save

login.py

+i =  3
+name = "python"
+password = "123"
+while True:
+    if i > 0:
+        username = input("请输入账号：")
+        userpassword = input("请输入密码：")
+        i-=1
+        if username == name and userpassword == password:
+            print("登录成功")
+            break
+        if username != name:
+            print("用户名输入错误")
+            print("你还有"+str(i)+"次机会")
+            continue
+        if userpassword == password:
+            print("密码输入错误")
+            print("你还有"+str(i)+"次机会")
+    else:
+        print("账户已被锁定")
+        exit()
+    
+print("欢迎来到贝尔编程")
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