| # 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!") | |
| cks = [""] | |
| tk_nums = [0] | |
| def add_chunk(t): | |
| nonlocal cks, tk_nums, delimiter | |
| tnum = num_tokens_from_string(t) | |
| if tnum < 8: | |
| pos = "" | |
| if tk_nums[-1] > chunk_token_num: | |
| cks.append(t) | |
| tk_nums.append(tnum) | |
| else: | |
| cks[-1] += t | |
| tk_nums[-1] += tnum | |
| s, e = 0, 1 | |
| while e < len(txt): | |
| if txt[e] in delimiter: | |
| add_chunk(txt[s: e + 1]) | |
| s = e + 1 | |
| e = s + 1 | |
| else: | |
| e += 1 | |
| if s < e: | |
| add_chunk(txt[s: e + 1]) | |
| return [[c,""] for c in cks] |