49 lines
1.5 KiB
Python
Executable File
49 lines
1.5 KiB
Python
Executable File
#!/usr/bin/env python
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import sys, re, operator, string, os
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#
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# Two down-to-earth things
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#
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stops = set(open("../stop_words.txt").read().split(",") + list(string.ascii_lowercase))
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def frequencies_imp(word_list):
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word_freqs = {}
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for w in word_list:
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if w in word_freqs:
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word_freqs[w] += 1
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else:
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word_freqs[w] = 1
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return word_freqs
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#
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# Let's write our functions as strings.
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#
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if len(sys.argv) > 1:
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extract_words_func = "lambda name : [x.lower() for x in re.split('[^a-zA-Z]+', open(name).read()) if len(x) > 0 and x.lower() not in stops]"
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frequencies_func = "lambda wl : frequencies_imp(wl)"
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sort_func = "lambda word_freq: sorted(word_freq.iteritems(), key=operator.itemgetter(1), reverse=True)"
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filename = sys.argv[1]
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else:
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extract_words_func = "lambda x: []"
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frequencies_func = "lambda x: []"
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sort_func = "lambda x: []"
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filename = os.path.basename(__file__)
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#
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# So far, this program isn't much about term-frequency. It's about
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# a bunch of strings that look like functions.
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# Let's add our functions to the "base" program, dynamically.
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#
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exec('extract_words = ' + extract_words_func)
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exec('frequencies = ' + frequencies_func)
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exec('sort = ' + sort_func)
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#
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# The main function. This would work just fine:
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# word_freqs = sort(frequencies(extract_words(filename)))
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#
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word_freqs = locals()['sort'](locals()['frequencies'](locals()['extract_words'](filename)))
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for (w, c) in word_freqs[0:25]:
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print w, ' - ', c
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