Source code for jina.types.arrays.mixins.text

from collections import Counter
from typing import Tuple, Dict


[docs]class TextToolsMixin: """Help functions used in NLP for DA and DAM"""
[docs] def get_vocabulary( self, min_freq: int = 1, text_attrs: Tuple[str, ...] = ('text',) ) -> Dict[str, int]: """Get the text vocabulary in a dict that maps from the word to the index from all Documents. :param text_attrs: the textual attributes where vocabulary will be derived from :param min_freq: the minimum word frequency to be considered into the vocabulary. :return: a vocabulary in dictionary where key is the word, value is the index. The value is 2-index, where `0` is reserved for padding, `1` is reserved for unknown token. """ all_tokens = Counter() for d in self: all_tokens.update(d.get_vocabulary(text_attrs=text_attrs)) # 0 for padding, 1 for unknown return { k: idx for idx, k in enumerate( (k for k, v in all_tokens.items() if v >= min_freq), start=2 ) }