Add lock to mld csv writing

import tempfile

import sys

from typing import Tuple

from multiprocessing import Pool

from multiprocessing import Pool, Lock

from dataclasses import dataclass

from typing import Union

import shutil

sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__)), ".."))

mldLock = Lock()

def readfile(

    filename: str, nchannels: int = 1, fs: int = 48000, outdtype="float"

                    np.array([f"{pytestTag}-FRM{x}" for x in range(mldThisFile.size)]),

                )

            )

            global mldLock

            with mldLock:

                with open(self.mldcsv[tag], "ab") as f:

                    np.savetxt(f, mldWithTags, fmt="%s", delimiter=",")

            with open(self.sampleStats[tag], "a") as f:

                f.write(

                    f"{pytestTag}, {maxDiff}, {rmsdB}, {beSamplesPercent}, {mldThisFile.max()}\n"