On Thu, Jun 5, 2014 at 1:58 PM, Paul Rubin <[email protected]> wrote:
> Ryan Hiebert <[email protected]> writes:
>> How so? I was using line=line[:-1] for removing the trailing newline, and
>> just replaced it with rstrip('\n'). What are you doing differently?
>
> rstrip removes all the newlines off the end, whether there are zero or
> multiple. In perl the difference is chomp vs chop. line=line[:-1]
> removes one character, that might or might not be a newline.
Given the description that the input string is "a textfile line", if
it has multiple newlines then it's invalid.
Personally I tend toward rstrip('\r\n') so that I don't have to worry
about files with alternative line terminators.
If you want to be really picky about removing exactly one line
terminator, then this captures all the relatively modern variations:
re.sub('\r?\n$|\n?\r$', line, '', count=1)
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