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- import sys
- import re
- # Reads from stdin line by line, writes to stdout line by line replacing
- # each odd argument with the subsequent even argument.
- def pairs(it):
- it = iter(it)
- try:
- while True:
- yield next(it), next(it)
- except StopIteration:
- return
- def main():
- rep_dict = dict()
- for fro, to in pairs(sys.argv[1:]):
- rep_dict[fro] = to
- if len(rep_dict):
- regex = re.compile("(%s)" % "|".join(map(re.escape, rep_dict.keys())))
- for line in iter(sys.stdin.readline, ''):
- sys.stdout.write(regex.sub(lambda mo: rep_dict[mo.string[mo.start():mo.end()]], line))
- else:
- for line in iter(sys.stdin.readline, ''):
- sys.stdout.write(line)
- if __name__ == '__main__':
- main()
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