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| """Separate text to zh en lists.""" | |
| # pylint: disable=unused-import, too-many-locals, invalid-name, too-many-branches, too-many-statements, | |
| # from typing import Tuple, | |
| from typing import Iterable, List, Optional, Tuple, Union # noqa | |
| import numpy as np | |
| # from fastlid import fastlid | |
| from polyglot.text import Detector | |
| from logzero import logger | |
| from radiobee.lists2cmat import lists2cmat | |
| from radiobee.detect import detect | |
| def text2lists( | |
| text: Union[Iterable[str], str], | |
| set_languages: Optional[List[str]] = None, | |
| ) -> Tuple[List[str], List[str]]: | |
| """Separate text to zh en lists. | |
| Args: | |
| text: mixed text | |
| set_languages: no default (open-end) | |
| use polyglot.text.Detector to pick two languages | |
| Attributes: | |
| cmat: correlation matrix (len(list_l) x len(list_r)) | |
| before adjusting (shifting) | |
| offset: plus, [""] * offset + list2 | |
| minus, [""] * (-offset) + list1 | |
| Returns: | |
| two lists, best effort alignment | |
| """ | |
| if not isinstance(text, str) and isinstance(text, Iterable): | |
| try: | |
| text = "\n".join(text) | |
| except Exception as e: | |
| logger.error(e) | |
| raise | |
| # set_languages default to ["en", "zh"] | |
| if set_languages is None: | |
| lang12 = [elm.code for elm in Detector(text).languages] | |
| # set_languages = ["en", "zh"] | |
| # set 'un' to 'en' | |
| # set_languages = ['en' if elm in ['un'] else elm for elm in lang12[:2]] | |
| set_languages = [] | |
| for elm in lang12[:2]: | |
| if elm in ["un"]: | |
| logger.warning(" Unknown language, set to en") | |
| set_languages.append("en") | |
| else: | |
| set_languages.append(elm) | |
| # fastlid.set_languages = set_languages | |
| list1 = [] | |
| list2 = [] | |
| # lang0, _ = fastlid(text[:15000]) | |
| lang0 = detect(text, set_languages) | |
| res = [] | |
| left = True # start with left list1 | |
| for elm in [_ for _ in text.splitlines() if _.strip()]: | |
| # lang, _ = fastlid(elm) | |
| lang = detect(elm, set_languages) | |
| if lang == lang0: | |
| res.append(elm) | |
| else: | |
| if left: | |
| # list1.append("\n".join(res)) | |
| list1.extend(res) | |
| else: | |
| # list2.append("\n".join(res)) | |
| list2.extend(res) | |
| left = not left | |
| res = [elm] | |
| lang0 = lang | |
| # process the last | |
| if left: | |
| list1.extend(res) | |
| else: | |
| list2.extend(res) | |
| try: | |
| # lang1, _ = fastlid(' '.join(list1)) | |
| lang1 = detect(" ".join(list1), set_languages) | |
| except Exception as exc: | |
| logger.error(exc) | |
| lang1 = "en" | |
| try: | |
| # lang2, _ = fastlid(' '.join(list2)) | |
| lang2 = detect(" ".join(list2), set_languages) | |
| except Exception as exc: | |
| logger.error(exc) | |
| lang2 = "en" | |
| # find offset via diagonal(k), | |
| len1, len2 = len(list1), len(list2) | |
| # len2, len1 = cmat.shape | |
| # len_r, len_c = cmat.shape | |
| # ylim, xlim = cmat.shape | |
| ylim, xlim = len2, len1 # check | |
| # cmat dim: len1 x len2 or ylim x xlim | |
| cmat = lists2cmat(list1, list2, lang1, lang2) | |
| # sq_mean_pair = [(elm, np.square(cmat.diagonal(elm)).mean()) for elm in range(2 - ylim, xlim + 1)] | |
| # df = pd.DataFrame(sq_mean_pair, columns=['offset', 'sq_mean']) | |
| # df.plot.scatter('offset', 'sq_mean') | |
| # optimum_offset = df.offset[df.sq_mean.argmax()] | |
| # equiv to np.argmax(sq_mean) - (ylim - 2) | |
| # locate max, -ylim + 2 ...xlim: range(1 - ylim, xlim) | |
| # sqare sum | |
| sq_mean = [np.square(cmat.diagonal(elm)).mean() for elm in range(1 - ylim, xlim - 1)] | |
| # tot: xlim + ylim - 1 | |
| # temp = [np.square(cmat.diagonal(elm)) for elm in range(2 - ylim, xlim + 1)] | |
| # sq_mean = [elm.mean() if np.any(elm) else 0.0 for elm in temp] | |
| # plt.figure() | |
| # plt.scatter(range(1 - ylim, xlim), sq_mean) | |
| offset = np.argmax(sq_mean) - (ylim - 1) | |
| text2lists.cmat = cmat | |
| text2lists.offset = offset | |
| text2lists.lang1 = lang1 | |
| text2lists.lang2 = lang2 | |
| # shift list1 if offsset >= 0, else shift list2 | |
| if offset > -1: | |
| # list1a = list1[:] | |
| # list2a = [""] * offset + list2 | |
| list2 = [""] * offset + list2 | |
| else: | |
| list1 = [""] * (-offset) + list1 | |
| # list1a = [""] * (-offset) + list1 | |
| # list2a = list2[:] | |
| return list1, list2 | |