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[extractor/common] Fix sorting with custom field preference

This commit is contained in:
Sergey M․ 2016-06-26 21:09:07 +07:00
parent c6781156aa
commit bf8dd79045
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1 changed files with 5 additions and 1 deletions
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6
youtube_dl/extractor/common.py
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@ -878,7 +878,11 @@ class InfoExtractor(object):
f['ext'] = determine_ext(f['url'])
if isinstance(field_preference, (list, tuple)):
return tuple(f.get(field) if f.get(field) is not None else -1 for field in field_preference)
return tuple(
f.get(field)
if f.get(field) is not None
else ('' if field == 'format_id' else -1)
for field in field_preference)
preference = f.get('preference')
if preference is None: