expected=True)
def _call_api(self, path, item_id, *args, **kwargs):
- kwargs.setdefault('headers', {})['Client-ID'] = self._CLIENT_ID
+ headers = kwargs.get('headers', {}).copy()
+ headers['Client-ID'] = self._CLIENT_ID
+ kwargs['headers'] = headers
response = self._download_json(
'%s/%s' % (self._API_BASE, path), item_id,
*args, **compat_kwargs(kwargs))