How can I remove a trailing newline?

Question

What is the Python equivalent of Perl\'s chomp function, which removes the last character of a string if it is a newline?

Answer 1

An example in Python's documentation simply uses line.strip().

Perl's chomp function removes one linebreak sequence from the end of a string only if it's actually there.

Here is how I plan to do that in Python, if process is conceptually the function that I need in order to do something useful to each line from this file:

import os
sep_pos = -len(os.linesep)
with open("file.txt") as f:
    for line in f:
        if line[sep_pos:] == os.linesep:
            line = line[:sep_pos]
        process(line)