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[extractor/common] Generalise _merge_subtitles

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This allows modifying a subtitles dictionary in-place.
This commit is contained in:
Felix S 2021-04-19 19:25:54 +02:00
parent d4553567d2
commit 19bb39202d
1 changed files with 16 additions and 6 deletions
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22
yt_dlp/extractor/common.py
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@ -3319,12 +3319,22 @@ def _merge_subtitle_items(subtitle_list1, subtitle_list2):
return ret
@classmethod
def _merge_subtitles(cls, subtitle_dict1, subtitle_dict2):
""" Merge two subtitle dictionaries, language by language. """
ret = dict(subtitle_dict1)
for lang in subtitle_dict2:
ret[lang] = cls._merge_subtitle_items(subtitle_dict1.get(lang, []), subtitle_dict2[lang])
return ret
def _merge_subtitles(cls, *dicts, **kwargs):
""" Merge subtitle dictionaries, language by language. """
target = (lambda target=None: target)(**kwargs)
# The above lambda extracts the keyword argument 'target' from kwargs
# while ensuring there are no stray ones. When Python 2 support
# is dropped, remove it and change the function signature to:
#
# def _merge_subtitles(cls, *dicts, target=None):
if target is None:
target = {}
for d in dicts:
for lang, subs in d.items():
target[lang] = cls._merge_subtitle_items(target.get(lang, []), subs)
return target
def extract_automatic_captions(self, *args, **kwargs):
if (self._downloader.params.get('writeautomaticsub', False)