diff options
Diffstat (limited to 'youtube/yt_data_extract.py')
| -rw-r--r-- | youtube/yt_data_extract.py | 99 |
1 files changed, 60 insertions, 39 deletions
diff --git a/youtube/yt_data_extract.py b/youtube/yt_data_extract.py index ec9d683..96021f1 100644 --- a/youtube/yt_data_extract.py +++ b/youtube/yt_data_extract.py @@ -832,7 +832,7 @@ def check_missing_keys(object, *key_sequences): return None -def extract_plain_text(node, default=None, recover_urls=False): +def extract_str(node, default=None, recover_urls=False): '''default is the value returned if the extraction fails. If recover_urls is true, will attempt to fix Youtube's truncation of url text (most prominently seen in descriptions)''' if isinstance(node, str): return node @@ -881,7 +881,7 @@ def extract_formatted_text(node): return [] -def extract_integer(string): +def extract_int(string): if not isinstance(string, str): return None match = re.search(r'(\d+)', string.replace(',', '')) @@ -892,11 +892,6 @@ def extract_integer(string): except ValueError: return None -def update_if_not_none(dictionary, key, value): - '''Update dictionary[key] with value if value is not none''' - if key not in dictionary or value is not None: - dictionary[key] = value - def extract_metadata_row_info(video_renderer_info): # extract category and music list info = { @@ -906,8 +901,8 @@ def extract_metadata_row_info(video_renderer_info): current_song = {} for row in default_multi_get(video_renderer_info, 'metadataRowContainer', 'metadataRowContainerRenderer', 'rows', default=[]): - row_title = extract_plain_text(default_multi_get(row, 'metadataRowRenderer', 'title'), default='') - row_content = extract_plain_text(default_multi_get(row, 'metadataRowRenderer', 'contents', 0)) + row_title = extract_str(default_multi_get(row, 'metadataRowRenderer', 'title'), default='') + row_content = extract_str(default_multi_get(row, 'metadataRowRenderer', 'contents', 0)) if row_title == 'Category': info['category'] = row_content elif row_title in ('Song', 'Music'): @@ -962,12 +957,12 @@ def extract_watch_info_mobile(top_level): video_info = {} info.update(extract_metadata_row_info(video_info)) - info['description'] = extract_plain_text(video_info.get('description'), recover_urls=True) - info['view_count'] = extract_integer(extract_plain_text(video_info.get('expandedSubtitle'))) - info['author'] = extract_plain_text(default_multi_get(video_info, 'owner', 'slimOwnerRenderer', 'title')) + info['description'] = extract_str(video_info.get('description'), recover_urls=True) + info['view_count'] = extract_int(extract_str(video_info.get('expandedSubtitle'))) + info['author'] = extract_str(default_multi_get(video_info, 'owner', 'slimOwnerRenderer', 'title')) info['author_id'] = default_multi_get(video_info, 'owner', 'slimOwnerRenderer', 'navigationEndpoint', 'browseEndpoint', 'browseId') - info['title'] = extract_plain_text(video_info.get('title')) - info['live'] = 'watching' in extract_plain_text(video_info.get('expandedSubtitle')) + info['title'] = extract_str(video_info.get('title')) + info['live'] = 'watching' in extract_str(video_info.get('expandedSubtitle')) info['unlisted'] = False for badge in video_info.get('badges', []): if default_multi_get(badge, 'metadataBadgeRenderer', 'label') == 'Unlisted': @@ -975,15 +970,15 @@ def extract_watch_info_mobile(top_level): info['like_count'] = None info['dislike_count'] = None if not info['published_date']: - info['published_date'] = extract_date(extract_plain_text(video_info.get('dateText', None))) + info['published_date'] = extract_date(extract_str(video_info.get('dateText', None))) for button in video_info.get('buttons', ()): button_renderer = button.get('slimMetadataToggleButtonRenderer', {}) # all the digits can be found in the accessibility data - count = extract_integer(default_multi_get(button_renderer, 'button', 'toggleButtonRenderer', 'defaultText', 'accessibility', 'accessibilityData', 'label')) + count = extract_int(default_multi_get(button_renderer, 'button', 'toggleButtonRenderer', 'defaultText', 'accessibility', 'accessibilityData', 'label')) # this count doesn't have all the digits, it's like 53K for instance - dumb_count = extract_integer(extract_plain_text(default_multi_get(button_renderer, 'button', 'toggleButtonRenderer', 'defaultText'))) + dumb_count = extract_int(extract_str(default_multi_get(button_renderer, 'button', 'toggleButtonRenderer', 'defaultText'))) # the accessibility text will be "No likes" or "No dislikes" or something like that, but dumb count will be 0 if dumb_count == 0: @@ -998,11 +993,11 @@ def extract_watch_info_mobile(top_level): items, _ = extract_items(response, item_types={'commentSectionRenderer'}) if items: comment_info = items[0]['commentSectionRenderer'] - comment_count_text = extract_plain_text(default_multi_get(comment_info, 'header', 'commentSectionHeaderRenderer', 'countText')) + comment_count_text = extract_str(default_multi_get(comment_info, 'header', 'commentSectionHeaderRenderer', 'countText')) if comment_count_text == 'Comments': # just this with no number, means 0 comments info['comment_count'] = 0 else: - info['comment_count'] = extract_integer(comment_count_text) + info['comment_count'] = extract_int(comment_count_text) info['comments_disabled'] = False else: # no comment section present means comments are disabled info['comment_count'] = 0 @@ -1028,21 +1023,21 @@ def extract_watch_info_desktop(top_level): video_info.update(list(renderer.values())[0]) info.update(extract_metadata_row_info(video_info)) - info['description'] = extract_plain_text(video_info.get('description', None), recover_urls=True) - info['published_date'] = extract_date(extract_plain_text(video_info.get('dateText', None))) + info['description'] = extract_str(video_info.get('description', None), recover_urls=True) + info['published_date'] = extract_date(extract_str(video_info.get('dateText', None))) likes_dislikes = default_multi_get(video_info, 'sentimentBar', 'sentimentBarRenderer', 'tooltip', default='').split('/') if len(likes_dislikes) == 2: - info['like_count'] = extract_integer(likes_dislikes[0]) - info['dislike_count'] = extract_integer(likes_dislikes[1]) + info['like_count'] = extract_int(likes_dislikes[0]) + info['dislike_count'] = extract_int(likes_dislikes[1]) else: info['like_count'] = None info['dislike_count'] = None - info['title'] = extract_plain_text(video_info.get('title', None)) - info['author'] = extract_plain_text(default_multi_get(video_info, 'owner', 'videoOwnerRenderer', 'title')) + info['title'] = extract_str(video_info.get('title', None)) + info['author'] = extract_str(default_multi_get(video_info, 'owner', 'videoOwnerRenderer', 'title')) info['author_id'] = default_multi_get(video_info, 'owner', 'videoOwnerRenderer', 'navigationEndpoint', 'browseEndpoint', 'browseId') - info['view_count'] = extract_integer(extract_plain_text(default_multi_get(video_info, 'viewCount', 'videoViewCountRenderer', 'viewCount'))) + info['view_count'] = extract_int(extract_str(default_multi_get(video_info, 'viewCount', 'videoViewCountRenderer', 'viewCount'))) related = default_multi_get(top_level, 'response', 'contents', 'twoColumnWatchNextResults', 'secondaryResults', 'secondaryResults', 'results', default=[]) info['related_videos'] = [renderer_info(renderer) for renderer in related] @@ -1093,13 +1088,14 @@ def extract_formats(info, player_response): def extract_playability_error(info, player_response, error_prefix=''): if info['formats']: + info['playability_status'] = None info['playability_error'] = None return playability_status = default_multi_get(player_response, 'playabilityStatus', 'status', default=None) info['playability_status'] = playability_status - playability_reason = extract_plain_text(multi_default_multi_get(player_response, + playability_reason = extract_str(multi_default_multi_get(player_response, ['playabilityStatus', 'reason'], ['playabilityStatus', 'errorScreen', 'playerErrorMessageRenderer', 'reason'], default='Could not find playability error') @@ -1110,6 +1106,17 @@ def extract_playability_error(info, player_response, error_prefix=''): else: info['playability_error'] = error_prefix + 'Unknown playability error' +def liberal_update(obj, key, value): + '''Updates obj[key] with value as long as value is not None. + Ensures obj[key] will at least get a value of None, however''' + if (value is not None) or (key not in obj): + obj[key] = value + +def conservative_update(obj, key, value): + '''Only updates obj if it doesn't have key or obj[key] is None''' + if obj.get(key) is None: + obj[key] = value + SUBTITLE_FORMATS = ('srv1', 'srv2', 'srv3', 'ttml', 'vtt') def extract_watch_info(polymer_json): info = {'playability_error': None, 'error': None} @@ -1183,19 +1190,33 @@ def extract_watch_info(polymer_json): else: info.update(extract_watch_info_desktop(top_level)) - # stuff from videoDetails - video_details = default_multi_get(top_level, 'playerResponse', 'videoDetails', default={}) - update_if_not_none(info, 'title', extract_plain_text(video_details.get('title'))) - update_if_not_none(info, 'duration', extract_integer(video_details.get('lengthSeconds'))) - update_if_not_none(info, 'view_count', extract_integer(video_details.get('viewCount'))) + # stuff from videoDetails. Use liberal_update to prioritize info from videoDetails over existing info + vd = default_multi_get(top_level, 'playerResponse', 'videoDetails', default={}) + liberal_update(info, 'title', extract_str(vd.get('title'))) + liberal_update(info, 'duration', extract_int(vd.get('lengthSeconds'))) + liberal_update(info, 'view_count', extract_int(vd.get('viewCount'))) # videos with no description have a blank string - update_if_not_none(info, 'description', video_details.get('shortDescription')) - update_if_not_none(info, 'id', video_details.get('videoId')) - update_if_not_none(info, 'author', video_details.get('author')) - update_if_not_none(info, 'author_id', video_details.get('channelId')) - update_if_not_none(info, 'live', video_details.get('isLiveContent')) - update_if_not_none(info, 'unlisted', not video_details.get('isCrawlable', True)) - update_if_not_none(info, 'tags', video_details.get('keywords', [])) + liberal_update(info, 'description', vd.get('shortDescription')) + liberal_update(info, 'id', vd.get('videoId')) + liberal_update(info, 'author', vd.get('author')) + liberal_update(info, 'author_id', vd.get('channelId')) + liberal_update(info, 'live', vd.get('isLiveContent')) + liberal_update(info, 'unlisted', not vd.get('isCrawlable', True)) + liberal_update(info, 'tags', vd.get('keywords', [])) + + # fallback stuff from microformat + mf = default_multi_get(top_level, 'playerResponse', 'microformat', 'playerMicroformatRenderer', default={}) + conservative_update(info, 'title', extract_str(mf.get('title'))) + conservative_update(info, 'duration', extract_int(mf.get('lengthSeconds'))) + # this gives the view count for limited state videos + conservative_update(info, 'view_count', extract_int(mf.get('viewCount'))) + conservative_update(info, 'description', extract_str(mf.get('description'), recover_urls=True)) + conservative_update(info, 'author', mf.get('ownerChannelName')) + conservative_update(info, 'author_id', mf.get('externalChannelId')) + conservative_update(info, 'unlisted', mf.get('isUnlisted')) + liberal_update(info, 'category', mf.get('category')) + liberal_update(info, 'published_date', mf.get('publishDate')) + liberal_update(info, 'uploaded_date', mf.get('uploadDate')) # other stuff info['author_url'] = 'https://www.youtube.com/channel/' + info['author_id'] if info['author_id'] else None |