save project

diy.py

-with open('C:\Users\CM\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8')
-    a=file.readlines()
-
-for i in a:
-    data=i.split()
-    sum=0
-    for sales in data[1:]：
-        sum=sum+int(sales)
-    result = data[0]+str(sum)
-    print(result)
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+username = "python"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名")
+    password = input("请输入密码")
+    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("密码输入错误,请重新输入")
+print("欢迎来到编程")
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