spaCy/spacy/tests/tokenizer/test_customized_tokenizer.py

# coding: utf-8
from __future__ import unicode_literals

from ...lang.en import English
from ...tokenizer import Tokenizer
from ... import util

import pytest

@pytest.fixture
def tokenizer(en_vocab):
    prefix_re = util.compile_prefix_regex(nlp_model.Defaults.prefixes)
    suffix_re = util.compile_suffix_regex(nlp_model.Defaults.suffixes)
    custom_infixes = ['\.\.\.+',
                      '(?<=[0-9])-(?=[0-9])',
                      # '(?<=[0-9]+),(?=[0-9]+)',
                      '[0-9]+(,[0-9]+)+',
                      u'[\[\]!&:,()\*—–\/-]']

    infix_re = util.compile_infix_regex(custom_infixes)
    return Tokenizer(en_vocab,
                     English.Defaults.tokenizer_exceptions,
                     prefix_re.search,
                     suffix_re.search,
                     infix_re.finditer,
                     token_match=None)

def test_customized_tokenizer_handles_infixes(tokenizer):
    sentence = "The 8 and 10-county definitions are not used for the greater Southern California Megaregion."
    context = [word.text for word in tokenizer(sentence)]
    assert context == [u'The', u'8', u'and', u'10', u'-', u'county', u'definitions', u'are', u'not', u'used',
                       u'for',
                       u'the', u'greater', u'Southern', u'California', u'Megaregion', u'.']

    # the trailing '-' may cause Assertion Error
    sentence = "The 8- and 10-county definitions are not used for the greater Southern California Megaregion."
    context = [word.text for word in tokenizer(sentence)]
    assert context == [u'The', u'8', u'-', u'and', u'10', u'-', u'county', u'definitions', u'are', u'not', u'used',
                       u'for',
                       u'the', u'greater', u'Southern', u'California', u'Megaregion', u'.']