Mathieu Prevot wrote: > I use in a bourne shell script the following filter: > > sed '/watch?v=/! d;s/.*v=//;s/\(.\{11\}\).*/\1/' \ > | sort | uniq | awk 'ORS=" "{print $1}' > > that give me all sets of 11 characters that follows the "watch?v=" > motif. I would like to do it in python on stdout from a > subprocess.Popen instance, using python tools rather than sed awk etc. > How can I do this ? Can I expect something as fast ?
You should either do it in Python , e. g.: def process(lines): candidates = (line.rstrip().partition("/watch?v=") for line in lines) matches = (c[:11] for a, b, c in candidates if len(c) >= 11) print " ".join(sorted(set(matches))) if __name__ == "__main__": import sys process(sys.stdin) or invoke your shell script via subprocess.Popen(). Invoking a python script via subprocess doesn't make sense IMHO. Peter -- http://mail.python.org/mailman/listinfo/python-list