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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 _api_call(self, endpoint, model=None, method=None, data=None, filters=None):
 """ Makes a call to the linode api. Data should only be given if the method is POST or PUT, and should be a dictionary """

        if not self.token:
            raise RuntimeError("You do not have an API token!")

        if not method:
            raise ValueError("Method is required for API calls!")

        if model:
            endpoint = endpoint.format(**vars(model))
        url = '{}{}'.format(self.base_url, endpoint)
        headers = {
            'Authorization': "Bearer {}".format(self.token),
            'Content-Type': 'application/json',
            'User-Agent': self._user_agent,
        }

        if filters:
            headers['X-Filter'] = json.dumps(filters)

        body = None
        if data is not None:
            body = json.dumps(data)

        response = method(url, headers=headers, data=body)

        warning = response.headers.get('Warning', None)
        if warning:
            logger.warning('Received warning from server: {}'.format(warning))

        if 399 < response.status_code < 600:
            j = None
            error_msg = '{}: '.format(response.status_code)
            try:
                j = response.json()
                if 'errors' in j.keys():
                    for e in j['errors']:
                        error_msg += '{}; '.format(e['reason']) \
                                if 'reason' in e.keys() else ''
            except:
                pass
            raise ApiError(error_msg, status=response.status_code, json=j)

        if response.status_code != 204:
            j = response.json()
        else:
            j = None # handle no response body

        return j