Fix "invalid escape sequences" error on Python 3.6

[youtube-dl] / youtube_dl / extractor / viewster.py

diff --git a/youtube_dl/extractor/viewster.py b/youtube_dl/extractor/viewster.py
index a93196a0772fd5588dd2f55c327427d00e814eb4..52dd95e2fe19041f01e49b1a4a3f9566c1f0e60b 100644 (file)
--- a/youtube_dl/extractor/viewster.py
+++ b/youtube_dl/extractor/viewster.py
@@ -157,7 +157,7 @@ class ViewsterIE(InfoExtractor):
                         formats.extend(m3u8_formats)
                 else:
                     qualities_basename = self._search_regex(
-                        '/([^/]+)\.csmil/',
+                        r'/([^/]+)\.csmil/',
                         manifest_url, 'qualities basename', default=None)
                     if not qualities_basename:
                         continue