'Get chart name for series_id
@todo: parameter description'

def getChartName(self, series_id):

    import hashlib
    h = hashlib.sha256()
    h.update(self.qstnWidget.question.code)
    encoded_part = h.hexdigest()
    chartName = ('survey_series_%s_%s' % (series_id, encoded_part))
    return chartName
