blank lines in file after sorting content of a text file in python

Question

I have this small script that sorts the content of a text file

# The built-in function `open` opens a file and returns a file object.

# Read mode opens a fi         


        

Answer 1

An "empty" line read from a text file is represented in Python by a string containing only a newline ("\n"). You may also want to avoid lines whose "data" consists only of spaces, tabs, etc ("whitespace"). The str.strip() method lets you detect both cases (a newline is whitespace).

f = open("tracks.txt", "r")
# omit empty lines and lines containing only whitespace
lines = [line for line in f if line.strip()]
f.close()
lines.sort()
# now write the output file