# python-holidays

# ---------------

# A fast, efficient Python library for generating country, province and state

# specific sets of holidays on the fly. It aims to make determining whether a

# specific date is a holiday as fast and flexible as possible.

#

# Authors: dr-prodigy <dr.prodigy.github@gmail.com> (c) 2017-2023

# ryanss <ryanssdev@icloud.com> (c) 2014-2017

# Website: https://github.com/dr-prodigy/python-holidays

# License: MIT (see LICENSE file)

def _normalize_arguments(cls, value):

"""Normalize arguments.

:param cls:

A type of arguments to normalize.

:param value:

Either a single item or an iterable of `cls` type.

:return:

A set created from `value` argument.

"""

if isinstance(value, cls):

return {value}

return set(value) if value is not None else set()

def _normalize_tuple(data):

"""Normalize tuple.

:param data:

Either a tuple or a tuple of tuples.

:return:

An unchanged object for tuple of tuples, e.g., ((JAN, 10), (DEC, 31)).

An object put into a tuple otherwise, e.g., ((JAN, 10),).

"""

return data if not data or isinstance(data[0], tuple) else (data,)