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batteries are included, so use them #8

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batteries are included, so use them #8

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19 changes: 12 additions & 7 deletions patmch/patmch_v1.py
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Original file line number Diff line number Diff line change
@@ -1,12 +1,17 @@
import re, sys
import re
import sys
import operator
import itertools

if (len(sys.argv) < 2):
if len(sys.argv) != 1:
sys.stderr.write("Usage: patmatch.py in.pattern < file.in\n")
sys.exit(1)

# the following is not correct. we have to trim off the tailing '\n'
strip_newline = operator.itemgetter(slice(0,-1))

r = re.compile(sys.argv[1])
for line in sys.stdin:
if r.search(line[0:-1]):
sys.stdout.write(line)
def match(regex, lines_with_cr):
search = re.compile(regex).search
return itertools.ifilter(search, itertools.imap(strip_newline, lines_with_cr))

for line in match(sys.argv[1], sys.stdin):
print line