small change to use python 3.9

#! /usr/bin/env python3

import argparse

import sys

from pathlib import Path

import sys

HERE = Path(__file__).parent.absolute().resolve()

sys.path.append(str(HERE.parent))

from ivas_processing_scripts import config

EXPERIMENTS_P800 = [f"P800-{i}" for i in range(1, 10)]

EXPERIMENTS_BS1534 = [f"BS1534-{i}{x}" for i in range(1, 8) for x in ["a", "b"]]

EXPERIMENTS = EXPERIMENTS_P800 + EXPERIMENTS_BS1534

#! /usr/bin/env python3

import argparse

import sys

from pathlib import Path

import sys

HERE = Path(__file__).parent.absolute()

sys.path.append(str(HERE.parent))

from ivas_processing_scripts import main as generate_test

import platform

from copy import deepcopy

from pathlib import Path

from typing import Union

import yaml

        return cfg

    def to_file(self, outfile: str|Path):

    def to_file(self, outfile: Union[str, Path]):

        to_dump = self._dump_yaml({k:v for k, v in self.__dict__.items() if k in self._dump_keys})

        with open(outfile, "w") as f:

            yaml.dump(to_dump, f)

#  the United Nations Convention on Contracts on the International Sales of Goods.

#

from pathlib import PurePath

from itertools import cycle

from pathlib import PurePath

""" Set up paths """

TESTS_DIR = PurePath(__file__).parent

import pytest

from numpy.random import random, seed

from experiments import create_experiment_config, create_items_p800

from ivas_processing_scripts import main as generate_test

from ivas_processing_scripts.audiotools import audio

from ivas_processing_scripts.audiotools.audiofile import concat, write

    EXPERIMENTS_DIR,

    FORMAT_TO_METADATA_FILES,

    INPUT_EXPERIMENT_NAMES,

    NCHAN_TO_FILE,

    LAB_IDS_FOR_EXPERIMENTS,

    NCHAN_TO_FILE,

    TESTS_DIR,

)

from experiments import create_experiment_config, create_items_p800

BG_NOISE_NAME = "background_noise_cat.wav"