23 lines
586 B
Python
23 lines
586 B
Python
# adapted from Alex Martelli's example in "Re-learning Python"
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# http://www.aleax.it/Python/accu04_Relearn_Python_alex.pdf
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# (slide 41) Ex: lines-by-word file index
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"""Build a map word -> list-of-line-numbers"""
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import sys
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import re
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NONWORD_RE = re.compile(r'\W+')
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idx = {}
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with open(sys.argv[1], encoding='utf-8') as fp:
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for n, line in enumerate(fp, 1):
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for word in NONWORD_RE.split(line):
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if word.strip():
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idx.setdefault(word, []).append(n)
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# print in alphabetical order
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for word in sorted(idx, key=str.upper):
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print(word, idx[word])
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