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250 lines
7.0 KiB
250 lines
7.0 KiB
# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Rules to verbalize numbers into Chinese characters.
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https://zh.wikipedia.org/wiki/中文数字#現代中文
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"""
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import re
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from collections import OrderedDict
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from typing import List
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DIGITS = {str(i): tran for i, tran in enumerate('零一二三四五六七八九')}
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UNITS = OrderedDict({
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1: '十',
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2: '百',
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3: '千',
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4: '万',
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8: '亿',
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})
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COM_QUANTIFIERS = '(朵|匹|张|座|回|场|尾|条|个|首|阙|阵|网|炮|顶|丘|棵|只|支|袭|辆|挑|担|颗|壳|窠|曲|墙|群|腔|砣|座|客|贯|扎|捆|刀|令|打|手|罗|坡|山|岭|江|溪|钟|队|单|双|对|出|口|头|脚|板|跳|枝|件|贴|针|线|管|名|位|身|堂|课|本|页|家|户|层|丝|毫|厘|分|钱|两|斤|担|铢|石|钧|锱|忽|(千|毫|微)克|毫|厘|(公)分|分|寸|尺|丈|里|寻|常|铺|程|(千|分|厘|毫|微)米|米|撮|勺|合|升|斗|石|盘|碗|碟|叠|桶|笼|盆|盒|杯|钟|斛|锅|簋|篮|盘|桶|罐|瓶|壶|卮|盏|箩|箱|煲|啖|袋|钵|年|月|日|季|刻|时|周|天|秒|分|旬|纪|岁|世|更|夜|春|夏|秋|冬|代|伏|辈|丸|泡|粒|颗|幢|堆|条|根|支|道|面|片|张|颗|块|元|(亿|千万|百万|万|千|百)|(亿|千万|百万|万|千|百|美|)元|(亿|千万|百万|万|千|百|)块|角|毛|分)'
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# 分数表达式
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RE_FRAC = re.compile(r'(-?)(\d+)/(\d+)')
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def replace_frac(match) -> str:
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"""
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Parameters
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----------
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match : re.Match
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Returns
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----------
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str
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"""
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sign = match.group(1)
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nominator = match.group(2)
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denominator = match.group(3)
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sign: str = "负" if sign else ""
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nominator: str = num2str(nominator)
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denominator: str = num2str(denominator)
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result = f"{sign}{denominator}分之{nominator}"
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return result
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# 百分数表达式
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RE_PERCENTAGE = re.compile(r'(-?)(\d+(\.\d+)?)%')
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def replace_percentage(match) -> str:
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"""
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Parameters
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----------
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match : re.Match
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Returns
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----------
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str
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"""
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sign = match.group(1)
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percent = match.group(2)
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sign: str = "负" if sign else ""
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percent: str = num2str(percent)
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result = f"{sign}百分之{percent}"
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return result
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# 整数表达式
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# 带负号的整数 -10
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RE_INTEGER = re.compile(r'(-)' r'(\d+)')
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def replace_negative_num(match) -> str:
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"""
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Parameters
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----------
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match : re.Match
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Returns
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----------
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str
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"""
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sign = match.group(1)
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number = match.group(2)
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sign: str = "负" if sign else ""
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number: str = num2str(number)
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result = f"{sign}{number}"
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return result
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# 编号-无符号整形
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# 00078
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RE_DEFAULT_NUM = re.compile(r'\d{3}\d*')
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def replace_default_num(match):
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"""
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Parameters
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----------
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match : re.Match
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Returns
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----------
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str
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"""
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number = match.group(0)
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return verbalize_digit(number)
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# 数字表达式
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# 纯小数
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RE_DECIMAL_NUM = re.compile(r'(-?)((\d+)(\.\d+))' r'|(\.(\d+))')
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# 正整数 + 量词
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RE_POSITIVE_QUANTIFIERS = re.compile(r"(\d+)([多余几])?" + COM_QUANTIFIERS)
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RE_NUMBER = re.compile(r'(-?)((\d+)(\.\d+)?)' r'|(\.(\d+))')
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def replace_positive_quantifier(match) -> str:
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"""
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Parameters
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----------
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match : re.Match
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Returns
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----------
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str
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"""
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number = match.group(1)
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match_2 = match.group(2)
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match_2: str = match_2 if match_2 else ""
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quantifiers: str = match.group(3)
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number: str = num2str(number)
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result = f"{number}{match_2}{quantifiers}"
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return result
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def replace_number(match) -> str:
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"""
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Parameters
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----------
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match : re.Match
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Returns
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----------
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str
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"""
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sign = match.group(1)
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number = match.group(2)
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pure_decimal = match.group(5)
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if pure_decimal:
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result = num2str(pure_decimal)
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else:
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sign: str = "负" if sign else ""
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number: str = num2str(number)
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result = f"{sign}{number}"
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return result
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# 范围表达式
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# match.group(1) and match.group(8) are copy from RE_NUMBER
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RE_RANGE = re.compile(
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r'((-?)((\d+)(\.\d+)?)|(\.(\d+)))[-~]((-?)((\d+)(\.\d+)?)|(\.(\d+)))')
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def replace_range(match) -> str:
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"""
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Parameters
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----------
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match : re.Match
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Returns
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----------
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str
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"""
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first, second = match.group(1), match.group(8)
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first = RE_NUMBER.sub(replace_number, first)
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second = RE_NUMBER.sub(replace_number, second)
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result = f"{first}到{second}"
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return result
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def _get_value(value_string: str, use_zero: bool=True) -> List[str]:
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stripped = value_string.lstrip('0')
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if len(stripped) == 0:
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return []
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elif len(stripped) == 1:
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if use_zero and len(stripped) < len(value_string):
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return [DIGITS['0'], DIGITS[stripped]]
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else:
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return [DIGITS[stripped]]
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else:
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largest_unit = next(
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power for power in reversed(UNITS.keys()) if power < len(stripped))
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first_part = value_string[:-largest_unit]
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second_part = value_string[-largest_unit:]
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return _get_value(first_part) + [UNITS[largest_unit]] + _get_value(
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second_part)
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def verbalize_cardinal(value_string: str) -> str:
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if not value_string:
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return ''
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# 000 -> '零' , 0 -> '零'
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value_string = value_string.lstrip('0')
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if len(value_string) == 0:
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return DIGITS['0']
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result_symbols = _get_value(value_string)
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# verbalized number starting with '一十*' is abbreviated as `十*`
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if len(result_symbols) >= 2 and result_symbols[0] == DIGITS[
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'1'] and result_symbols[1] == UNITS[1]:
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result_symbols = result_symbols[1:]
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return ''.join(result_symbols)
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def verbalize_digit(value_string: str, alt_one=False) -> str:
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result_symbols = [DIGITS[digit] for digit in value_string]
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result = ''.join(result_symbols)
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if alt_one:
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result.replace("一", "幺")
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return result
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def num2str(value_string: str) -> str:
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integer_decimal = value_string.split('.')
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if len(integer_decimal) == 1:
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integer = integer_decimal[0]
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decimal = ''
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elif len(integer_decimal) == 2:
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integer, decimal = integer_decimal
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else:
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raise ValueError(
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f"The value string: '${value_string}' has more than one point in it."
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)
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result = verbalize_cardinal(integer)
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decimal = decimal.rstrip('0')
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if decimal:
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# '.22' is verbalized as '零点二二'
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# '3.20' is verbalized as '三点二
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result = result if result else "零"
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result += '点' + verbalize_digit(decimal)
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return result
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