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

This would replicate exactly perl's chomp (minus behavior on arrays) for "\n" line terminator:

def chomp(x):
    if x.endswith("\r\n"): return x[:-2]
    if x.endswith("\n") or x.endswith("\r"): return x[:-1]
    return x

(Note: it does not modify string 'in place'; it does not strip extra trailing whitespace; takes \r\n in account)