"Joseph T. Tannenbaum" wrote:
>
> Hello,
>
> I am going through Mastering Regular Expressions by Jeffrey Friedl (O'Reilly
> book)
> and I got to a snippet of using a regular expression in python. I am using
> python
> 1.5.2 for win98, and this prog doen't work correctly. (it is supposed to
> point out
> double words in a text file ei "the the world." The main part I am in doubt
> about
> is setting up 'data' prior to printing. Is this format correct? It is on
> pg 57 of
> the book, and the reg3 line is correct by the errata.
>
> Thanks
> Joe
>
> Here is the snippet:
>
> import sys; import regex; import regsub
>
> ### Prepare the three regeses w'll use
> reg1 = regex.compile(
> '\\b\([a-z]+\)\(\([\n\r\t\f\v ]\|<[^>]+>\)+\)\(\\1\\b\)',
> regex.casefold)
> reg2 = regex.compile('^\([^033]*\n\)+')
^\033
This my be just a post typo, but...
> reg3 = regex.compile('^\(.\)')
>
> for filename in sys.argv[1:]: # for each file...
> try:
> file = open(filename) # try opening file
> except IOError, info:
> print '%s: %s' % (filename, info[1]) # report error if couldn't
> continue # and also abort this iteration.
>
> data = file.read() # Slurp the whole file to 'data', apply regexes
> and print
> data = regsub.gsub(reg1, '\033[7m\\1\033[m\2\033[7m\\4\033[m', data)
^^^ ^^^ ^^^ ^^^
Please excuse ignorance, but what are these?
> data = regsub.gsub(reg2, '', data)
> data = regsub.gsub(reg3, filename + ': \\1', data)
> print data,
^
I guess this just depends on what's next?
Note: Don't really know jack diddly bout Python. Just attracted by the smell
of regexs.
Saaalute!!
MD
>
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