# -*- coding: utf-8 -*-
"""
Recognizes locations in text
"""
from typing import List, Tuple
from pythainlp.corpus import provinces
[docs]def tag_provinces(tokens: List[str]) -> List[Tuple[str, str]]:
"""
This function recognize Thailand provinces in text.
Note that it uses exact match and considers no context.
:param list[str] tokens: a list of words
:reutrn: a list of tuple indicating NER for `LOCATION` in IOB format
:rtype: list[tuple[str, str]]
:Example:
::
from pythainlp.tag import tag_provinces
text = ['หนองคาย', 'น่าอยู่']
tag_provinces(text)
# output: [('หนองคาย', 'B-LOCATION'), ('น่าอยู่', 'O')]
"""
province_list = provinces()
output = [
(token, "B-LOCATION") if token in province_list else (token, "O")
for token in tokens
]
return output