[twitch] Don't pollute default headers dict

2018-09-17 22:14:28 +07:00
parent c11485162b
commit e2f61598be
1 changed files with 3 additions and 1 deletions
--- a/youtube_dl/extractor/twitch.py
+++ b/youtube_dl/extractor/twitch.py
@@ -51,7 +51,9 @@ class TwitchBaseIE(InfoExtractor):
                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))