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From: _wolf on 14 Mar 2010 11:57

i just discovered http://code.google.com/p/re2, a promising library
that uses a long-neglected way (Thompson NFA) to implement a regular
expression engine that can be orders of magnitudes faster than the
available engines of awk, Perl, or Python.

so i downloaded the code and did the usual sudo make install thing.
however, that action had seemingly done little more than adding /usr/
local/include/re2/re2.h to my system. there seemed to be some `*.a
file in addition, but then what is it with this *.a extension?

i would like to use re2 from Python (preferrably Python 3.1) and was
excited to see files like make_unicode_groups.py in the distro (maybe
just used during the build process?). those however were not deployed
on my machine.

how can i use re2 from Python?

(this message appeared before under
http://stackoverflow.com/questions/2439345/is-it-possible-to-use-re2-from-python
and, even earlier, http://groups.google.com/group/re2-dev/t/59b78327ec3cca0a)
From: Kev Dwyer on 14 Mar 2010 14:18
On Sun, 14 Mar 2010 08:57:36 -0700, _wolf wrote:


>
> how can i use re2 from Python?
>

Hello Wolf,

There's a recent thread about this on the python-dev list,
Unfortunately it seems to suggest that there are no Python
bindings at present.

Cheers,

Kev



From: Vlastimil Brom on 14 Mar 2010 16:49
2010/3/14 _wolf <wolfgang.lipp(a)gmail.com>:
>...
> i would like to use re2 from Python (preferrably Python 3.1) and was
> excited to see files like make_unicode_groups.py in the distro (maybe
> just used during the build process?). those however were not deployed
> on my machine.
>...
>

If you would need a re engine with features like unicode rangees,
script, and character properties classes and many others, you may try
the proposed implementation of the re library currently available in
python issue tracker:
http://bugs.python.org/issue2636
I am personally more than satisfied with this development version
sofar, however, as some new feature like unlimited lookarounds etc.
suggest, it is a classic backtracking engine (as opposed to re2, if
you need this very implementation).

hth
vbr
From: _wolf on 14 Mar 2010 17:40

i am afraid that thread goes straight perpendicular to what re2 is
supposed to be, or do. my suggestion for these folks would be to
create a new, clean interface to stop the violence that comes with the
Python ``re`` interface, and open the thing up so one can plug in
``re`` implementations as are needed. when i absolutely need a
feature, i can always go to the slower machine; simpler regular
expressions could be dealt with more efficiently.

From: _wolf on 14 Mar 2010 17:40

> There's a recent thread about this on the python-dev list,

pointers? i searched but didn’t find anything.
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