如何在保留旧行的同时在文本文件中写新行

Question

When I open a text file and write in it and at the end of the program close it, the lines stay in the text file. When i reopen that program, rather than writing on a new set of lines, it overwrites what is already there. I want to keep both pieces of text, it is for data logging. Any ideas on how to fix this.

Answer 1

You should use the a mode, like this:

with open("file","a") as f:
    f.write("Something") 

This will append to the file instead of overwriting it.