Re: converting a sed / grep / awk / . . . bash pipe line intopython

[Marc 'BlackJack' Rintsch]

On Tue, 02 Sep 2008 10:36:50 -0700, hofer wrote:

sed 's/\.\..*//' \ ### remove '//' comments | sed 's/#.*//'

Comment does not match the code. Or vice versa. :-)

Untested:

from __future__ import with_statement
from itertools import ifilter, ifilterfalse, imap


def is_junk(line):
line = line.rstrip()
return not line or line.startswith ('//') or line.startswith ('#')


def extract_numbers (line):
result = map(int, line.split()[:2])
assert len(result) == 2
return result


def main():
with open('test.txt' ) as lines:
clean_lines = ifilterfalse(is _junk, lines)
pairs = imap(extract_nu mbers, clean_lines)
print '\n'.join(b for a, b in pairs if a + b == 42)


if __name__ == '__main__':
main()

Ciao,
Marc 'BlackJack' Rintsch