A couple of weeks ago I asked about a way to parse man pages, and Danny and
Alan answered me with some tips (thanks). I've tryed doclifter, which I
already knew, but could not yet master it; in fact, it just doesn't work with
many of the man-pages I tried in my debian system. Anyway, I'm refreshing my
mind about regular expressions in python, and while trying to document my
steps, I found a weird syntax problem. The problem is: why the hell do I need
to escape special caracters when in verbose mode? And why isn't it made clear
on the re module doc page ( http://docs.python.org/lib/module-re.html ).
I'll just paste below (or above? I never know how to say this in english) my
ipython's session, you'll see what I mean.
But before that, an extra question to tutors: do you have some advice for
people like me who like to program but can't spend enough time doing it?
...it's a joke...
In [18]: re.compile("ab").match("abc").group()
Out[18]: 'ab'
In [19]: re.compile("ab", re.X).match("abc").group()
Out[19]: 'ab'
In [20]: re.compile("a\tb").match("a\tbc").group()
Out[20]: 'a\tb'
In [21]: re.compile("a\tb", re.X).match("a\tbc").group()
---------------------------------------------------------------------------
exceptions.AttributeError Traceback (most recent
call last)
/home/tiago/<ipython console>
AttributeError: 'NoneType' object has no attribute 'group'
In [22]: re.compile("a\tb", re.X).match(r"a\tbc").group()
---------------------------------------------------------------------------
exceptions.AttributeError Traceback (most recent
call last)
/home/tiago/<ipython console>
AttributeError: 'NoneType' object has no attribute 'group'
In [23]: re.compile(r"a\tb", re.X).match("a\tbc").group()
Out[23]: 'a\tb'
In [24]: re.compile("a\\tb", re.X).match("a\tbc").group()
Out[24]: 'a\tb'
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