| # 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. | |
| # | |
| from rag.nlp import find_codec,num_tokens_from_string | |
| import re | |
| class RAGFlowTxtParser: | |
| def __call__(self, fnm, binary=None, chunk_token_num=128, delimiter="\n!?;。；！？"): | |
| txt = "" | |
| if binary: | |
| encoding = find_codec(binary) | |
| txt = binary.decode(encoding, errors="ignore") | |
| else: | |
| with open(fnm, "r") as f: | |
| while True: | |
| l = f.readline() | |
| if not l: | |
| break | |
| txt += l | |
| return self.parser_txt(txt, chunk_token_num, delimiter) | |
| def parser_txt(cls, txt, chunk_token_num=128, delimiter="\n!?;。；！？"): | |
| if type(txt) != str: | |
| raise TypeError("txt type should be str!") | |
| sections = [] | |
| for sec in re.split(r"[%s]+"%delimiter, txt): | |
| if sections and sec in delimiter: | |
| sections[-1][0] += sec | |
| continue | |
| if num_tokens_from_string(sec) > 10 * int(chunk_token_num): | |
| sections.append([sec[: int(len(sec) / 2)], ""]) | |
| sections.append([sec[int(len(sec) / 2) :], ""]) | |
| else: | |
| sections.append([sec, ""]) | |
| return sections |