How to use the praatio.utilities.utils function in praatio

# The praat script uses append mode, so we need to clear any prior
        # result
        if os.path.exists(outputFN):
            os.remove(outputFN)
        
        if pitchQuadInterp is True:
            doInterpolation = 1
        else:
            doInterpolation = 0
    
        argList = [inputFN, outputFN, sampleStep,
                   minPitch, maxPitch, silenceThreshold, pitchUnit, -1, -1,
                   medianFilterWindowSize, doInterpolation]
        
        scriptName = "get_pitch_and_intensity.praat"
        scriptFN = join(utils.scriptsPath, scriptName)
        utils.runPraatScript(praatEXE, scriptFN, argList)

    piList = loadTimeSeriesData(outputFN, undefinedValue=undefinedValue)
    
    return piList

startTime = targetTime
        if reverse is True:
            startTime = targetTime - timeStep
            
        # Don't read over the edges
        if startTime < 0:
            timeStep = startTime + timeStep
            startTime = 0
        elif startTime + timeStep > self.getDuration():
            timeStep = self.getDuration() - startTime
        
        endTime = startTime + timeStep
        
        # 1 Get the acoustic information and the sign for each sample
        frameList = self.getSamples(startTime, endTime)
        signList = [utils.sign(val) for val in frameList]
        
        # 2 did signs change?
        changeList = [signList[i] != signList[i + 1]
                      for i in range(len(frameList) - 1)]
        
        # 3 get samples where signs changed
        # (iterate backwards if reverse is true)
        if reverse is True:
            start = len(changeList) - 1
            stop = 0
            step = -1
        else:
            start = 0
            stop = len(changeList) - 1
            step = 1

def getValuesInIntervals(self, dataTupleList):
        '''
        Returns data from dataTupleList contained in labeled intervals
        
        dataTupleList should be of the form:
        [(time1, value1a, value1b,...), (time2, value2a, value2b...), ...]
        '''
        
        returnList = []
        
        for interval in self.entryList:
            intervalDataList = utils.getValuesInInterval(dataTupleList,
                                                         interval[0],
                                                         interval[1])
            returnList.append((interval, intervalDataList))
        
        return returnList

def changeGender(praatEXE, wavFN, outputWavFN, pitchFloor, pitchCeiling,
                 formantShiftRatio, pitchMedian=0.0, pitchRange=1.0,
                 duration=1.0, scriptFN=None):
    '''
    Changes the speech formants in a file using praat's change gender function

    PitchMedian = 0.0; no change in median pitch
    PitchRange = 1.0; no change in pitch range
    '''
    if scriptFN is None:
        scriptFN = join(utils.scriptsPath,
                        "change_gender.praat")

    #  Praat crashes on exit after resynthesis with a klaatgrid
    utils.runPraatScript(praatEXE, scriptFN,
                         [wavFN, outputWavFN, pitchFloor, pitchCeiling,
                          formantShiftRatio, pitchMedian, pitchRange,
                          duration])