refactoring

src/BatchCodeTableIntoHistogramDescriptionTableMerger.py

@@ -1,30 +1,48 @@
 import pandas as pd
+from Utils import get_dictWithKeys_dictWithoutKeys
+
 
 class BatchCodeTableIntoHistogramDescriptionTableMerger:
 
-    # FK-TODO: refactor
-    @staticmethod
-    def mergeBatchCodeTableIntoHistogramDescriptionTable(batchCodeTable, histogramDescriptionTable):
-        def merge(src):
-             dst = src['HISTOGRAM_DESCRIPTION']
-             # dict_3 = {**dict_1, **dict_2}
-             dst['Adverse Reaction Reports'] = src['Adverse Reaction Reports']
-             dst['Deaths'] = src['Deaths']
-             dst['Disabilities'] = src['Disabilities']
-             dst['Life Threatening Illnesses'] = src['Life Threatening Illnesses']
-             dst['Company'] = src['Company']
-             dst['Severe reports'] = src['Severe reports']
-             dst['Lethality'] = src['Lethality']
-             return dst
-        mergedTable = pd.merge(
-             histogramDescriptionTable,
-             batchCodeTable,
-             how = 'left',
-             left_index = True,
-             right_index = True,
-             validate = 'one_to_one')
-        mergedTable = mergedTable[['HISTOGRAM_DESCRIPTION', 'Adverse Reaction Reports', 'Deaths', 'Disabilities', 'Life Threatening Illnesses', 'Company', 'Severe reports', 'Lethality']].apply(merge, axis='columns')
-        mergedTable.name = 'HISTOGRAM_DESCRIPTION'
-        mergedTable = mergedTable.to_frame()
+    def __init__(self):
+        self.HISTOGRAM_DESCRIPTION_columnName = 'HISTOGRAM_DESCRIPTION'
+
+    def mergeBatchCodeTableIntoHistogramDescriptionTable(self, batchCodeTable, histogramDescriptionTable):
+        mergedTable = self._combineTables(batchCodeTable, histogramDescriptionTable)
+        mergedTable = self._merge_columns_into_HISTOGRAM_DESCRIPTION(mergedTable)
         mergedTable['COUNTRY'] = histogramDescriptionTable['COUNTRY']
         return mergedTable
+
+    def _combineTables(self, batchCodeTable, histogramDescriptionTable):
+        mergedTable = pd.merge(
+            histogramDescriptionTable,
+            batchCodeTable,
+            how='left',
+            left_index=True,
+            right_index=True,
+            validate='one_to_one')
+        return mergedTable[
+            [
+                self.HISTOGRAM_DESCRIPTION_columnName,
+                'Adverse Reaction Reports',
+                'Deaths',
+                'Disabilities',
+                'Life Threatening Illnesses',
+                'Company',
+                'Severe reports',
+                'Lethality'
+            ]]
+
+    def _merge_columns_into_HISTOGRAM_DESCRIPTION(self, table):
+        table = table.apply(
+            self.__merge_columns_into_HISTOGRAM_DESCRIPTION,
+            axis='columns')
+        table.name = self.HISTOGRAM_DESCRIPTION_columnName
+        return table.to_frame()
+
+    def __merge_columns_into_HISTOGRAM_DESCRIPTION(self, src):
+        dict_with_HISTOGRAM_DESCRIPTION, dict_without_HISTOGRAM_DESCRIPTION = get_dictWithKeys_dictWithoutKeys(
+            src.to_dict(),
+            {self.HISTOGRAM_DESCRIPTION_columnName})
+        HISTOGRAM_DESCRIPTION = dict_with_HISTOGRAM_DESCRIPTION[self.HISTOGRAM_DESCRIPTION_columnName]
+        return {**HISTOGRAM_DESCRIPTION, **dict_without_HISTOGRAM_DESCRIPTION}