Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #17938 > unrolled thread

Re: Backslash Escapes

Back to article view | Back to comp.lang.python

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  Re: Backslash Escapes MRAB <python@mrabarnett.plus.com> - 2011-12-26 01:26 +0000

#17938 — Re: Backslash Escapes

On 26/12/2011 01:04, Felipe O wrote:
> Hi all,
> Whenever I take any input (raw_input, of course!) or I read from a
> file, etc., any backslashes get escaped automatically. Is there any
> elegant way of parsing the backslashes as though they were written in
> a python string. The best I have so far right now goes like this:
>
> def parse_backslash_escapes(input_string):
>      parts = input_string.split("'''")  # That's ' " " " ' without the spaces
>      '"""'.join(eval + p + '"""') for p in parts)
>
> I'm not entirely convinced that it's safe on two accounts.
> + Is that eval statement safe? The input could be coming from an
> unfriendly source.
> + Are there any obscure backslash escapes or other tricks I should be aware of?
>
> I guess the alternative is to make a dictionary of all the escapes I
> want to support, but that sounds tedious and error-prone.
>
Try input_string.decode("string-escape") if input_string is a
bytestring or input_string.decode("unicode-escape") it's a Unicode
string.

[toc] | [standalone]

Back to top | Article view | comp.lang.python

csiph-web