74 lines
1.7 KiB
Python
74 lines
1.7 KiB
Python
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from __future__ import division, print_function
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from nltk.tokenize import word_tokenize
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import nltk
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import os
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from io import open
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import re
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import sys
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nltk.download('punkt')
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NUM = '<NUM>'
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PUNCTS = {".": ".PER", ",": ".COM", "?": "?QUE", "!": ".PER", ":": ",COM", ";": ".PER", "-": ",COM"}
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forbidden_symbols = re.compile(r"[\[\]\(\)\/\\\>\<\=\+\_\*]")
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numbers = re.compile(r"\d")
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multiple_punct = re.compile(r'([\.\?\!\,\:\;\-])(?:[\.\?\!\,\:\;\-]){1,}')
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is_number = lambda x: len(numbers.sub("", x)) / len(x) < 0.6
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def untokenize(line):
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return line.replace(" '", "'").replace(" n't", "n't").replace("can not", "cannot")
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def skip(line):
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if line.strip() == '':
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return True
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last_symbol = line[-1]
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if not last_symbol in PUNCTS:
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return True
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if forbidden_symbols.search(line) is not None:
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return True
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return False
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def process_line(line):
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tokens = word_tokenize(line)
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output_tokens = []
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for token in tokens:
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if token in PUNCTS:
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output_tokens.append(PUNCTS[token])
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elif is_number(token):
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output_tokens.append(NUM)
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else:
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output_tokens.append(token.lower())
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return untokenize(" ".join(output_tokens) + " ")
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skipped = 0
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with open(sys.argv[2], 'w', encoding='utf-8') as out_txt:
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with open(sys.argv[1], 'r', encoding='utf-8') as text:
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for line in text:
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line = line.replace("\"", "").strip()
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line = multiple_punct.sub(r"\g<1>", line)
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if skip(line):
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skipped += 1
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continue
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line = process_line(line)
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out_txt.write(line)
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print("Skipped %d lines" % skipped)
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