auto save

01.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=i-1
+
+        if name != username:
+            print("用户名出错，请重新输入！")
+            print("温馨提示：您还有"+str(i)+"次登录机会！")
+            continue
+
+        if password != userpassword:
+            print("用户密码错误!请重新输入")
+            print("温馨提示：您还有"+str(i)+"次登录机会！")
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+    else:
+        print("您的账号已被锁定！")
+        exit()
+print("欢迎来到贝尔编程!")
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