def transform(self, essence_col, next_col): derived_col = dict(essence_col) derived_col['Year'] = \ Container.convertStandardDateToYear(essence_col['Date']) derived_col['YearMonth'] = \ Container.convertStandardDateToYearMonth(essence_col['Date']) derived_col['SimplifiedAlias'], \ derived_col['Account'], \ derived_col['Category'], \ derived_col['Subcategory'] = \ self.processAccountAlias(essence_col['AccountAlias']) return True, derived_col