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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def import_obj(cls, slc_to_import, slc_to_override, import_time=None):
 """Inserts or overrides slc in the database. remote_id and import_time fields in params_dict are set to track the slice origin and ensure correct overrides for multiple imports. Slice.perm is used to find the datasources and connect them. :param Slice slc_to_import: Slice object to import :param Slice slc_to_override: Slice to replace, id matches remote_id :returns: The resulting id for the imported slice :rtype: int """

        session = db.session
        make_transient(slc_to_import)
        slc_to_import.dashboards = []
        slc_to_import.alter_params(
            remote_id=slc_to_import.id, import_time=import_time)

        slc_to_import = slc_to_import.copy()
        params = slc_to_import.params_dict
        slc_to_import.datasource_id = ConnectorRegistry.get_datasource_by_name(
            session, slc_to_import.datasource_type, params['datasource_name'],
            params['schema'], params['database_name']).id
        if slc_to_override:
            slc_to_override.override(slc_to_import)
            session.flush()
            return slc_to_override.id
        session.add(slc_to_import)
        logging.info('Final slice: {}'.format(slc_to_import.to_json()))
        session.flush()
        return slc_to_import.id