aleaxit at yahoo.com
Wed Sep 1 14:25:31 CEST 2004
Mike Maxwell <maxwell at ldc.upenn.edu> wrote:
> Alex Martelli wrote:
> > Mike Maxwell <maxwell at ldc.upenn.edu> wrote:
> > No, I think you're correctly observing that Python isn't oriented to
> > one-liners -- not at all. Most interesting things in Python require
> > more than one line.
> I don't care whether it's "interesting", I just want to get some work
Something that lets you get work done IS thereby interesting. Most
interesting things in Python require more than one line. So, I don't
see the basis for your rant.
> And since most of the text processing tools in Unixes that I
> would otherwise use (grep, sed, tr) don't support Unicode, and are
> inconsistent in their regular expression notation to boot, it would be
> nice if I could write regex operations in a single, consistent
> programming language. Python is a single, consistent programming
> language, but as you say, it doesn't lend itself to one-liners.
No, but a supporting script similar to the one I suggest below can
easily be adapter to offer more sensible functionality than any oneliner
might sensibly support -- for example (for the kinds of tasks you imply)
by including and automatically using such modules as re and fileinput.
> > now, sometying like
> > bangoneliner.py 'for x in xrange(7):! if x%2:! print x'
> > should work
> Hmm, I may give that a try...thanks!
> > note that inserting the spaces after the bangs to simulate
> > proper indentation IS a silly fuss, but you hafta...:-).
> Well, I guess I could translate some other char (one that's easier to
> count than spaces) into indents, too.
Sure, or you could use (e.g.) '!3' to translate into 'newline then three
spaces', or use block start/endmarkers and translate them into
indents/dedents, etc, etc.
Personally, given your now-restated problem, that you need 'better'
versions of grep, sed and tr, I would take another tack -- I would
reimplement _those_ in Python with its re sublanguage and Unicode
support. Using them should be easier and tighter than putting newliners
together, I think.
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