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utils.py
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utils.py
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# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2023 CERN.
#
# Invenio is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# Invenio 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
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Invenio; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""Various utility functions."""
from datetime import datetime
import dateutil.parser
import pytz
import six
from werkzeug.utils import import_string
def utcnow():
"""UTC timestamp (with timezone)."""
return datetime.now(tz=pytz.utc)
def iso_utcnow():
"""UTC ISO8601 formatted timestamp."""
return utcnow().isoformat()
def parse_timestamp(x):
"""Parse ISO8601 formatted timestamp."""
dt = dateutil.parser.parse(x)
if dt.tzinfo is None:
dt = dt.replace(tzinfo=pytz.utc)
return dt
def obj_or_import_string(value, default=None):
"""Import string or return object.
:params value: Import path or class object to instantiate.
:params default: Default object to return if the import fails.
:returns: The imported object.
"""
if isinstance(value, six.string_types):
return import_string(value)
elif value:
return value
return default