Why does isort consider parser as built-in package?

[secsilm]

parser 总是与 time 和 typing 这些内置包在一起：

import time
from parser import CategoryParser, TagParser  # <--- HERE
from typing import Tuple

from dateutil.parser import parse as parsedate
from loguru import logger

from data_types import CategoryResult, News, TagResult
from utils import clean_text