Avi Kak wrote:
> Does regular expression processing in Python allow for executable
> code to be embedded inside a regular expression?
>
> For example, in Perl the following two statements
>
> $regex = qr/hello(?{print "saw hello\n"})mello(?{print "saw
> mello\n"})/;
> "jellohellomello" =~ /$regex/;
>
> will produce the output
>
> saw hello
> saw mello
>
> Is it possible to do the same in Python with any modules that come
> with the standard distribution, or with any other modules?
Just in case you were referring to security concerns: Sufficiently complex REs
can take ages to compile and run and eat tons of memory, so there are always
issues involved here.
Stefan
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