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# Copyright (c) 2024 Alibaba Inc (authors: Xiang Lyu, Zhihao Du)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import re
chinese_char_pattern = re.compile(r'[\u4e00-\u9fff]+')
# whether contain chinese character
def contains_chinese(text):
return bool(chinese_char_pattern.search(text))
# replace special symbol
def replace_corner_mark(text):
text = text.replace('²', '平方')
text = text.replace('³', '立方')
return text
# remove meaningless symbol
def remove_bracket(text):
text = text.replace('（', '').replace('）', '')
text = text.replace('【', '').replace('】', '')
text = text.replace('`', '').replace('`', '')
text = text.replace("——", " ")
return text
# spell Arabic numerals
def spell_out_number(text: str, inflect_parser):
new_text = []
st = None
for i, c in enumerate(text):
if not c.isdigit():
if st is not None:
num_str = inflect_parser.number_to_words(text[st: i])
new_text.append(num_str)
st = None
new_text.append(c)
else:
if st is None:
st = i
if st is not None and st < len(text):
num_str = inflect_parser.number_to_words(text[st:])
new_text.append(num_str)
return ''.join(new_text)
# split paragrah logic：
# 1. per sentence max len token_max_n, min len token_min_n, merge if last sentence len less than merge_len
# 2. cal sentence len according to lang
# 3. split sentence according to puncatation
def split_paragraph(text: str, tokenize, lang="zh", token_max_n=80, token_min_n=60, merge_len=20, comma_split=False):
def calc_utt_length(_text: str):
if lang == "zh":
return len(_text)
else:
return len(tokenize(_text))
def should_merge(_text: str):
if lang == "zh":
return len(_text) < merge_len
else:
return len(tokenize(_text)) < merge_len
if lang == "zh":
pounc = ['。', '？', '！', '；', '：', '、', '.', '?', '!', ';']
else:
pounc = ['.', '?', '!', ';', ':']
if comma_split:
pounc.extend(['，', ','])
st = 0
utts = []
for i, c in enumerate(text):
if c in pounc:
if len(text[st: i]) > 0:
utts.append(text[st: i] + c)
if i + 1 < len(text) and text[i + 1] in ['"', '”']:
tmp = utts.pop(-1)
utts.append(tmp + text[i + 1])
st = i + 2
else:
st = i + 1
if len(utts) == 0:
if lang == "zh":
utts.append(text + '。')
else:
utts.append(text + '.')
final_utts = []
cur_utt = ""
for utt in utts:
if calc_utt_length(cur_utt + utt) > token_max_n and calc_utt_length(cur_utt) > token_min_n:
final_utts.append(cur_utt)
cur_utt = ""
cur_utt = cur_utt + utt
if len(cur_utt) > 0:
if should_merge(cur_utt) and len(final_utts) != 0:
final_utts[-1] = final_utts[-1] + cur_utt
else:
final_utts.append(cur_utt)
return final_utts
# remove blank between chinese character
def replace_blank(text: str):
out_str = []
for i, c in enumerate(text):
if c == " ":
if ((text[i + 1].isascii() and text[i + 1] != " ") and
(text[i - 1].isascii() and text[i - 1] != " ")):
out_str.append(c)
else:
out_str.append(c)
return "".join(out_str)
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