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:")
+        if name == username and password == userpassword:
+            print("Log in successfully!")
+            break
+        if name != username:
+            print("Please reenter the user name error!")
+            print("Warm reminder：You still have" + str(i) + "Sublogin opportunity")
+            continue      
+    else:
+        print("用户名和密码错误!请重新输入")
+    print("欢迎来到贝尔编程!")
+# 如果用户输入的账号、密码正确，提示登陆成功
+# 如果用户输入的账号、密码正确，提示登陆成功
+   
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