Python:从文本文件中生成的splitlines()，然后将它们写回文本文件。

I am working on making a python program that fetches data from a website then records it in a text file. I want this to record the last 1000 (I am testing with 4 and a string "hello") entries and delete the rest. Here is what I have so far:I am working on making a python program that fe