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35 lines
741 B
Python
35 lines
741 B
Python
from ...attrs import LIKE_NUM
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import re
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# cf. Goyvaerts/Levithan 2009; case-insensitive, allow 4
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roman_numerals_compile = re.compile(
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r"(?i)^(?=[MDCLXVI])M*(C[MD]|D?C{0,4})(X[CL]|L?X{0,4})(I[XV]|V?I{0,4})$"
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)
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_num_words = set(
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"""
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unus una unum duo duae tres tria quattuor quinque sex septem octo novem decem
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""".split()
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)
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_ordinal_words = set(
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"""
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primus prima primum secundus secunda secundum tertius tertia tertium
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""".split()
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)
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def like_num(text):
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if text.isdigit():
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return True
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if roman_numerals_compile.match(text):
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return True
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if text.lower() in _num_words:
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return True
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if text.lower() in _ordinal_words:
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return True
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return False
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LEX_ATTRS = {LIKE_NUM: like_num}
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