auto save

diy2.py

+username = "python"
+userpassword = "123456"
+while True:
+    name=input("name:")
+    password=input("password:")# 请用input()实现用户输入账号、密码的功能
+    if password==userpassword and name==username:
+        print("Login successful.")
+        break
+    if password != userpassword
+        print("Your password is wrong.")
+    if name != username
+        print("Your name is wrong.")
+print("Welcome to bellcode!")
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