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74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
"""
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Example of multi-processing with Joblib. Here, we're exporting
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part-of-speech-tagged, true-cased, (very roughly) sentence-separated text, with
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each "sentence" on a newline, and spaces between tokens. Data is loaded from
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the IMDB movie reviews dataset and will be loaded automatically via Thinc's
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built-in dataset loader.
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Last updated for: spaCy 2.0.0a18
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"""
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from __future__ import print_function, unicode_literals
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from toolz import partition_all
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from pathlib import Path
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from joblib import Parallel, delayed
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import thinc.extra.datasets
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import plac
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import spacy
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@plac.annotations(
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output_dir=("Output directory", "positional", None, Path),
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model=("Model name (needs tagger)", "positional", None, str),
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n_jobs=("Number of workers", "option", "n", int),
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batch_size=("Batch-size for each process", "option", "b", int),
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limit=("Limit of entries from the dataset", "option", "l", int))
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def main(output_dir, model='en_core_web_sm', n_jobs=4, batch_size=1000,
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limit=10000):
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nlp = spacy.load(model) # load spaCy model
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print("Loaded model '%s'" % model)
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if not output_dir.exists():
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output_dir.mkdir()
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# load and pre-process the IMBD dataset
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print("Loading IMDB data...")
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data, _ = thinc.extra.datasets.imdb()
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texts, _ = zip(*data[-limit:])
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partitions = partition_all(batch_size, texts)
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items = ((i, [nlp(text) for text in texts], output_dir) for i, texts
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in enumerate(partitions))
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Parallel(n_jobs=n_jobs)(delayed(transform_texts)(*item) for item in items)
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def transform_texts(batch_id, docs, output_dir):
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out_path = Path(output_dir) / ('%d.txt' % batch_id)
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if out_path.exists(): # return None in case same batch is called again
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return None
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print('Processing batch', batch_id)
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with out_path.open('w', encoding='utf8') as f:
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for doc in docs:
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f.write(' '.join(represent_word(w) for w in doc if not w.is_space))
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f.write('\n')
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print('Saved {} texts to {}.txt'.format(len(docs), batch_id))
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def represent_word(word):
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text = word.text
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# True-case, i.e. try to normalize sentence-initial capitals.
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# Only do this if the lower-cased form is more probable.
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if text.istitle() and is_sent_begin(word) \
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and word.prob < word.doc.vocab[text.lower()].prob:
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text = text.lower()
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return text + '|' + word.tag_
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def is_sent_begin(word):
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if word.i == 0:
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return True
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elif word.i >= 2 and word.nbor(-1).text in ('.', '!', '?', '...'):
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return True
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else:
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return False
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if __name__ == '__main__':
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plac.call(main)
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