#!/usr/bin/env python3

##
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
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"""
Arbitrary utilities and polyfills.
"""

import random
import sys

if sys.version_info >= (3, 8):
    from typing import TypedDict
else:
    from typing_extensions import TypedDict


def _randbytes(n: int) -> bytes:
    """Polyfill for random.randbytes in Python < 3.9"""
    return bytes(random.choices(range(256), k=n))


randbytes = getattr(random, "randbytes", _randbytes)

__all__ = ("randbytes", "TypedDict")
