import inflect import re _inflect = inflect.engine() _comma_number_re = re.compile(r'([0-9][0-9\,]+[0-9])') _decimal_number_re = re.compile(r'([0-9]+\.[0-9]+)') _pounds_re = re.compile(r'£([0-9\,]*[0-9]+)') _dollars_re = re.compile(r'\$([0-9\.\,]*[0-9]+)') _ordinal_re = re.compile(r'[0-9]+(st|nd|rd|th)') _number_re = re.compile(r'[0-9]+') def _remove_commas(m): return m.group(1).replace(',', '') def _expand_decimal_point(m): return m.group(1).replace('.', ' point ') def _expand_dollars(m): match = m.group(1) parts = match.split('.') if len(parts) > 2: return match + ' dollars' # Unexpected format dollars = int(parts[0]) if parts[0] else 0 cents = int(parts[1]) if len(parts) > 1 and parts[1] else 0 if dollars and cents: dollar_unit = 'dollar' if dollars == 1 else 'dollars' cent_unit = 'cent' if cents == 1 else 'cents' return '%s %s, %s %s' % (dollars, dollar_unit, cents, cent_unit) elif dollars: dollar_unit = 'dollar' if dollars == 1 else 'dollars' return '%s %s' % (dollars, dollar_unit) elif cents: cent_unit = 'cent' if cents == 1 else 'cents' return '%s %s' % (cents, cent_unit) else: return 'zero dollars' def _expand_ordinal(m): return _inflect.number_to_words(m.group(0)) def _expand_number(m): num = int(m.group(0)) if num > 1000 and num < 3000: if num == 2000: return 'two thousand' elif num > 2000 and num < 2010: return 'two thousand ' + _inflect.number_to_words(num % 100) elif num % 100 == 0: return _inflect.number_to_words(num // 100) + ' hundred' else: return _inflect.number_to_words(num, andword='', zero='oh', group=2).replace(', ', ' ') else: return _inflect.number_to_words(num, andword='') def normalize_numbers(text): text = re.sub(_comma_number_re, _remove_commas, text) text = re.sub(_pounds_re, r'\1 pounds', text) text = re.sub(_dollars_re, _expand_dollars, text) text = re.sub(_decimal_number_re, _expand_decimal_point, text) text = re.sub(_ordinal_re, _expand_ordinal, text) text = re.sub(_number_re, _expand_number, text) return text