![image](https://assets.leetcode.com/users/immike/image_1554688291.png)\n\nI use Python 3.6. As shown in the screenshot, the \'List\' type define always reports an error in my IDE. Each time, when I want to use Python 3 to solve a question, I have to manually delete it.\n\nIt would be very appreciated if any one has any idea to solve this problem. Thanks a lot.

\n\nI use Python 3.6. As shown in the screenshot, the \'List\' type define always reports an error in my IDE. Each time, when I want to use Python 3 to solve a 