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

I find it convenient to have be able to get the chomped lines via in iterator, parallel to the way you can get the un-chomped lines from a file object. You can do so with the following code:

def chomped_lines(it):
    return map(operator.methodcaller('rstrip', '\r\n'), it)

Sample usage:

with open("file.txt") as infile:
    for line in chomped_lines(infile):
        process(line)