Remove all blank lines from a text file in python

Question

I'm trying to figure out how to remove an empty line from a text file while only using python. The input should be like:

firstline
secondline

thirdline

And the output should be:

firstline
secondline
thirdline

So I have this right now...

import sys

with open("New Text Document.txt") as f:
    for line in f:
        if not line.isspace():
            sys.stdout.write(line)

Welcome to SO. please see (how to ask a good question)[https://stackoverflow.com/help/how-to-ask] — an inconspicuous semicolon, May 27 '21 at 09:02
Does this answer your question? [How to remove empty lines with or without whitespace in Python](https://stackoverflow.com/questions/3711856/how-to-remove-empty-lines-with-or-without-whitespace-in-python) — agentsmith, May 27 '21 at 11:50

score 0 · Answer 1 · answered May 27 '21 at 09:20

0

file = open('demo.txt', 'r')
arr = file.readlines()
print([v for v in arr if not v.isspace()])

answered May 27 '21 at 09:20

meadhu

1 Answers1