Fix "invalid escape sequences" error on Python 3.6

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

diff --git a/youtube_dl/extractor/promptfile.py b/youtube_dl/extractor/promptfile.py
index d40cca06f989b7c99329e1650497a06e9a6390e4..23ac93d7e248bce034fcb221d26089d8be412ee2 100644 (file)
--- a/youtube_dl/extractor/promptfile.py
+++ b/youtube_dl/extractor/promptfile.py
@@ -20,7 +20,7 @@ class PromptFileIE(InfoExtractor):
             'id': '86D1CE8462-576CAAE416',
             'ext': 'mp4',
             'title': 'oceans.mp4',
-            'thumbnail': 're:^https?://.*\.jpg$',
+            'thumbnail': r're:^https?://.*\.jpg$',
         }
     }