Tempo:
> I am having a little trouble extracting text from a string. The
> string that I am dealing with is pasted below, and I want to
> extract the prices that are contained in the string below.
This may help:
>>> import re
>>> reg = r"(?<= \$ ) (?: \d* \.? \d* )"
>>> prices = re.compile(reg, flags=re.VERBOSE)
>>> prices.findall('</span>, $66.99 <span class="sale"> $.99')
['66.99', '.99']
You can read about Python regular expressions:
http://www.amk.ca/python/howto/regex/
http://docs.python.org/lib/module-re.html
------------------------
Perl 6 regular expressions are verbose by default, future Python may do
the same.
>From Apocalypse 5, by Larry Wall:
http://dev.perl.org/perl6/doc/design/apo/A05.html
>In real life, tokens are more recognizable if they are separated by
>whitespace.<
>Now, you may rightly point out that + is something we already have, and we
>already introduced /x to allow whitespace, so why is this bullet point here?
>Well, there's a lot of inertia in culture, and the problem with /x is that
>it's not the default, so people don't think to turn it on when it would
>probably do a lot of good. The culture is biased in the wrong direction.
>Whitespace around tokens should be the norm, not the exception. It should be
>acceptable to use whitespace to separate tokens that could be confused.<
Bye,
bearophile
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