Add lines to existing file using Python
append, file, python
Solution
If you want to append to the file, open it with `'a'`. If you want to seek through the file to find the place where you should insert the line, use `'r+'`. (docs)
Problem
I already created a txt file using python with a few lines of text that will be read by a simple program. However, I am having some trouble reopening the file and writing additional lines in the file in a later part of the program. (The lines will be written from user input obtained later on.) ``` with open('file.txt', 'w') as file: file.write('input') ``` This is assuming that 'file.txt' has been opened before and written in. In opening this a second time however, with the code that I currently have, I have to erase everything that was written before and rewrite the new line. Is there a way to prevent this from happening (and possibly cut down on the excessive code of opening the file again)?