class SymptomHistogramByBatchcodeTableFactory:

    @staticmethod
    def createSymptomHistogramByBatchcodeTable(symptomByBatchcodeTable):
        return (symptomByBatchcodeTable
                    .groupby(symptomByBatchcodeTable.index.names + ['COUNTRY'])
                    ['SYMPTOM'].value_counts()
                    .to_frame(name = 'SYMPTOM_COUNT_BY_VAX_LOT')
                    .reset_index(level = 'COUNTRY')
                    [['SYMPTOM_COUNT_BY_VAX_LOT', 'COUNTRY']])