auto save

diy2.py

+i=3
+username = "python"    
+userpassword = "123456"
+while True:
+    if i>0:
+        name=input("请输入用户名")
+        password=input("请输入密码")
+        i-=1
+        if name==username and password==userpassword:
+            print("登陆成功")
+            break
+        if name!=username:
+            print("用户名错误，请重新输入")
+            continue
+        if password!=userpassword:
+            print("密码错误，请重新输入")
+    else:
+        print("账户已锁定，请带身份证来我司解锁")
+        exit()
+print("欢迎来到贝尔编程！")