Fix "invalid escape sequences" error on Python 3.6

[youtube-dl] / youtube_dl / YoutubeDL.py

diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 53f20ac2cb1bd16398e160db329004b49d6bf424..5d654f55f681757388f8dcceb5935016ba467a52 100755 (executable)
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -1339,7 +1339,7 @@ class YoutubeDL(object):
                 format['format_id'] = compat_str(i)
             else:
                 # Sanitize format_id from characters used in format selector expression
-                format['format_id'] = re.sub('[\s,/+\[\]()]', '_', format['format_id'])
+                format['format_id'] = re.sub(r'[\s,/+\[\]()]', '_', format['format_id'])
             format_id = format['format_id']
             if format_id not in formats_dict:
                 formats_dict[format_id] = []