Fix "invalid escape sequences" error on Python 3.6

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

diff --git a/youtube_dl/extractor/stanfordoc.py b/youtube_dl/extractor/stanfordoc.py
index 4a3d8bb8f267b588c59e2f16b208955a70d362d9..cce65fb1014d3595670707d8009832ea37f448dc 100644 (file)
--- a/youtube_dl/extractor/stanfordoc.py
+++ b/youtube_dl/extractor/stanfordoc.py
@@ -66,7 +66,7 @@ class StanfordOpenClassroomIE(InfoExtractor):
                 r'(?s)<description>([^<]+)</description>',
                 coursepage, 'description', fatal=False)
 
-            links = orderedSet(re.findall('<a href="(VideoPage.php\?[^"]+)">', coursepage))
+            links = orderedSet(re.findall(r'<a href="(VideoPage.php\?[^"]+)">', coursepage))
             info['entries'] = [self.url_result(
                 'http://openclassroom.stanford.edu/MainFolder/%s' % unescapeHTML(l)
             ) for l in links]
@@ -84,7 +84,7 @@ class StanfordOpenClassroomIE(InfoExtractor):
             rootpage = self._download_webpage(rootURL, info['id'],
                                               errnote='Unable to download course info page')
 
-            links = orderedSet(re.findall('<a href="(CoursePage.php\?[^"]+)">', rootpage))
+            links = orderedSet(re.findall(r'<a href="(CoursePage.php\?[^"]+)">', rootpage))
             info['entries'] = [self.url_result(
                 'http://openclassroom.stanford.edu/MainFolder/%s' % unescapeHTML(l)
             ) for l in links]