John Pye wrote:
> Hi all
>
> I have a file with a bunch of perl regular expressions like so:
>
> /(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/ #
> bold
> /(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/
> b>''$3/ # italic bold
> /(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/ #
> italic
>
> These are all find/replace expressions delimited as '/search/replace/
> # comment' where 'search' is the regular expression we're searching
> for and 'replace' is the replacement expression.
>
> Is there an easy and general way that I can split these perl-style
> find-and-replace expressions into something I can use with Python, eg
> re.sub('search','replace',str) ?
>
> I though generally it would be good enough to split on '/' but as you
> see the <\/b> messes that up. I really don't want to learn perl
> here :-)
>
> Cheers
> JP
>
This could be more general, in principal a perl regex could end with a
"\", e.g. "\\/", but I'm guessing that won't happen here.
py> for p in perlish:
... print p
...
/(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/
/(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/b>''$3/
/(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/
py> import re
py> splitter = re.compile(r'[^\\]/')
py> for p in perlish:
... print splitter.split(p)
...
['/(^|[\\s\\(])\\*([^ ].*?[^ ])\\*([\\s\\)\\.\\,\\:\\;\\!\\?]|$',
"$1'''$2'''$", '']
['/(^|[\\s\\(])\\_\\_([^ ].*?[^ ])\\_\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$',
"$1''<b>$2<\\/b>''$", '']
['/(^|[\\s\\(])\\_([^ ].*?[^ ])\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$',
"$1''$2''$", '']
(I'm hoping this doesn't wrap!)
James
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