auto save

diy2.py

-i=3
 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 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("登录成功!")
-            break
-        else name != username:
-            print("用户名不存在,请重新输入!")
-            comtinue
-        else:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break
+    else name != username:
+        print("用户名不存在,请重新输入!")
+        comtinue
+    else:
         print("用户名和密码错误!请重新输入")
         print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")