#!/usr/bin/env python
#
# utils.py
"""
General utility functions.
"""
#
# Copyright © 2020 Dominic Davis-Foster <dominic@davis-foster.co.uk>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
# stdlib
import re
from typing import Any, Dict, Mapping, Pattern, Union
__all__ = ["search_dict"]
[docs]def search_dict(dictionary: Mapping[str, Any], regex: Union[str, Pattern]) -> Dict[str, Any]:
"""
Return the subset of the dictionary whose keys match the regex.
:param dictionary:
:param regex:
"""
if not isinstance(regex, Pattern):
regex = re.compile(regex)
return {key: value for key, value in dictionary.items() if regex.match(key)}