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-rw-r--r--youtube_dl/extractor/udemy.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/youtube_dl/extractor/udemy.py b/youtube_dl/extractor/udemy.py
index 79c45f80e..105826e9b 100644
--- a/youtube_dl/extractor/udemy.py
+++ b/youtube_dl/extractor/udemy.py
@@ -122,7 +122,9 @@ class UdemyIE(InfoExtractor):
raise ExtractorError(error_str, expected=True)
def _download_webpage_handle(self, *args, **kwargs):
- kwargs.setdefault('headers', {})['User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.4'
+ headers = kwargs.get('headers', {}).copy()
+ headers['User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.4'
+ kwargs['headers'] = headers
return super(UdemyIE, self)._download_webpage_handle(
*args, **compat_kwargs(kwargs))