Optimization and correction options for the presented code

This example shows a class responsible for generating reports. In the constructor, a dictionary data is created, which stores financial and non-financial reports. For non-financial reports, a defaultdict with a template that returns a record structure is used. Then, helper methods are called to fill in the data, and under certain conditions, they are additionally updated.

class GenerateReport:
    def __init__(self, *args, **kwargs):
        self.data = {
            'fin_reports': dict(),
            'non_fin_reports': defaultdict(self._non_fin_record_template),
        }
        self.setup_some_data(*args, **kwargs)
        if some_condition:
            self.update_some_data(*args, **kwargs)
            # several more such method calls
            ...

    def _non_fin_record_template(self):
        return {
            'sections': [],
            'totals': [],
        }

    def setup_some_data(self, *args, **kwargs):
        # make some calculations
        # ...
        # then set the data
        self.data['non_fin_reports']['sections']['section']['sub_section'] = some_data

    def update_some_data(self, *args, **kwargs):
        # make some calculations
        # ...
        # then update the data
        self.data['non_fin_reports']['sections']['section'] = updated_data

    @property
    def data(self):
        return self._data

    # usage example
    generate_report(*args, **kwargs)
    service = GenerateReport(*args, **kwargs)
    return Response(data=service.data)

The description mentions typical issues that may arise in such code: name conflicts between property and attribute, missing import of defaultdict, incorrect access to nested dictionary structures, etc. It is recommended to analyze these points and suggest ways to fix them.