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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 populate_local_cache(self):
 """This populates the local cache after reading the Database. It calls the appropriate rule create, fw create routines. It doesn't actually call the routine to prepare the fabric or cfg the device since it will be handled by retry module. """

        fw_dict = self.get_all_fw_db()
        LOG.info("Populating FW Mgr Local Cache")
        for fw_id in fw_dict:
            fw_data = fw_dict.get(fw_id)
            tenant_id = fw_data.get('tenant_id')
            rule_dict = fw_data.get('rules').get('rules')
            policy_id = fw_data.get('rules').get('firewall_policy_id')
            for rule in rule_dict:
                fw_evt_data = self.convert_fwdb_event_msg(rule_dict.get(rule),
                                                          tenant_id, rule,
                                                          policy_id)
                LOG.info("Populating Rules for tenant %s", tenant_id)
                self.fw_rule_create(fw_evt_data, cache=True)
            fw_os_data = self.os_helper.get_fw(fw_id)
            # If enabler is stopped and FW is deleted, then the above routine
            # will fail.
            if fw_os_data is None:
                fw_os_data = self.convert_fwdb(tenant_id, fw_data.get('name'),
                                               policy_id, fw_id)
            LOG.info("Populating FW for tenant %s", tenant_id)
            self.fw_create(fw_os_data, cache=True)
            if fw_data.get('device_status') == 'SUCCESS':
                self.fwid_attr[tenant_id].fw_drvr_created(True)
            else:
                self.fwid_attr[tenant_id].fw_drvr_created(False)
        return fw_dict