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From: dmtr on 17 Jun 2010 17:42
I need to print the regexp pattern text (SRE_Pattern object ) for
debugging purposes, is there any way to do it gracefully? I've came up
with the following hack, but it is rather crude... Is there an
official way to get the regexp pattern text?

>>> import re, pickle
>>> r = re.compile('^abc$', re.I)
>>> r
<_sre.SRE_Pattern object at 0xb7e6a330>

>>> ds = pickle.dumps(r)
>>> ds
"cre\n_compile\np0\n(S'^abc$'\np1\nI2\ntp2\nRp3\n."

>>> re.search("\n\(S'(.*)'\n", ds).group(1)
'^abc$'
>>>

-- Cheers, Dmitry
From: dmtr on 17 Jun 2010 18:49
On Jun 17, 3:35 pm, MRAB <pyt...(a)mrabarnett.plus.com> wrote:
>
>  >>> import re
>  >>> r = re.compile('^abc$', re.I)
>  >>> r.pattern
> '^abc$'
>  >>> r.flags
> 2


Hey, thanks. It works.

Couldn't find it in a reference somehow.
And it's not in the inspect.getmembers(r).
Must be doing something wrong.....

-- Cheers, Dmitry
From: MRAB on 17 Jun 2010 19:16
dmtr wrote:
> On Jun 17, 3:35 pm, MRAB <pyt...(a)mrabarnett.plus.com> wrote:
>> >>> import re
>> >>> r = re.compile('^abc$', re.I)
>> >>> r.pattern
>> '^abc$'
>> >>> r.flags
>> 2
>
> Hey, thanks. It works.
>
> Couldn't find it in a reference somehow.
> And it's not in the inspect.getmembers(r).
> Must be doing something wrong.....
>
Occasionally you'll find classes whose instances don't reveal all their
attributes to dir() and so forth, so it's always a good idea to
double-check the documentation.

The documentation mentions the .pattern and .flags attributes at:

http://docs.python.org/library/re.html
Section 7.2.4. Regular Expression Objects

(Python 2.6)
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