spaCy/spacy/lang/en/lex_attrs.py

# coding: utf8
from __future__ import unicode_literals

from ...attrs import LIKE_NUM


_num_words = [
    "zero",
    "one",
    "two",
    "three",
    "four",
    "five",
    "six",
    "seven",
    "eight",
    "nine",
    "ten",
    "eleven",
    "twelve",
    "thirteen",
    "fourteen",
    "fifteen",
    "sixteen",
    "seventeen",
    "eighteen",
    "nineteen",
    "twenty",
    "thirty",
    "forty",
    "fifty",
    "sixty",
    "seventy",
    "eighty",
    "ninety",
    "hundred",
    "thousand",
    "million",
    "billion",
    "trillion",
    "quadrillion",
    "gajillion",
    "bazillion",
]


_ordinal_words = [
    "first",
    "second",
    "third",
    "fourth",
    "fifth",
    "sixth",
    "seventh",
    "eighth",
    "ninth",
    "tenth",
    "eleventh",
    "twelfth",
    "thirteenth",
    "fourteenth",
    "fifteenth",
    "sixteenth",
    "seventeenth",
    "eighteenth",
    "nineteenth",
    "twentieth",
    "thirtieth",
    "fortieth",
    "fiftieth",
    "sixtieth",
    "seventieth",
    "eightieth",
    "ninetieth",
    "hundredth",
    "thousandth",
    "millionth",
    "billionth",
    "trillionth",
    "quadrillionth",
    "gajillionth",
    "bazillionth",
]

def like_num(text):
    if text.startswith(("+", "-", "±", "~")):
        text = text[1:]
    text = text.replace(",", "").replace(".", "")
    if text.isdigit():
        return True
    if text.count("/") == 1:
        num, denom = text.split("/")
        if num.isdigit() and denom.isdigit():
            return True
    
    text_lower = text.lower()
    if text_lower in _num_words:
        return True

    # CHeck ordinal number
    if text_lower in _ordinal_words:
        return True
    if text_lower.endswith("th"):
        if text_lower[:-2].isdigit():
            return True 

    return False


LEX_ATTRS = {LIKE_NUM: like_num}