[cleanup] Misc cleanup

7 files changed, 21 insertions, 32 deletions

diff --git a/yt_dlp/extractor/animelab.py b/yt_dlp/extractor/animelab.py
index cd0d77805..fe2b70aed 100644
--- a/yt_dlp/extractor/animelab.py
+++ b/yt_dlp/extractor/animelab.py
@@ -53,11 +53,6 @@ class AnimeLabBaseIE(InfoExtractor):
 class AnimeLabIE(AnimeLabBaseIE):
     _VALID_URL = r'https?://(?:www\.)?animelab\.com/player/(?P<id>[^/]+)'
 
-    # the following tests require authentication, but a free account will suffice
-    # just set 'usenetrc' to true in test/local_parameters.json if you use a .netrc file
-    # or you can set 'username' and 'password' there
-    # the tests also select a specific format so that the same video is downloaded
-    # regardless of whether the user is premium or not (needs testing on a premium account)
     _TEST = {
         'url': 'https://www.animelab.com/player/fullmetal-alchemist-brotherhood-episode-42',
         'md5': '05bde4b91a5d1ff46ef5b94df05b0f7f',
@@ -76,9 +71,9 @@ class AnimeLabIE(AnimeLabBaseIE):
             'season_id': '38',
         },
         'params': {
+            # Ensure the same video is downloaded whether the user is premium or not
             'format': '[format_id=21711_yeshardsubbed_ja-JP][height=480]',
         },
-        'skip': 'All AnimeLab content requires authentication',
     }
 
     def _real_extract(self, url):
diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index e2460b36a..ebeca4395 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -3639,20 +3639,17 @@ class InfoExtractor:
             t['name'] = cls.ie_key()
             yield t
 
+    @classproperty
+    def age_limit(cls):
+        """Get age limit from the testcases"""
+        return max(traverse_obj(
+            tuple(cls.get_testcases(include_onlymatching=False)),
+            (..., (('playlist', 0), None), 'info_dict', 'age_limit')) or [0])
+
     @classmethod
     def is_suitable(cls, age_limit):
-        """ Test whether the extractor is generally suitable for the given
-        age limit (i.e. pornographic sites are not, all others usually are) """
-
-        any_restricted = False
-        for tc in cls.get_testcases(include_onlymatching=False):
-            if tc.get('playlist', []):
-                tc = tc['playlist'][0]
-            is_restricted = age_restricted(tc.get('info_dict', {}).get('age_limit'), age_limit)
-            if not is_restricted:
-                return True
-            any_restricted = any_restricted or is_restricted
-        return not any_restricted
+        """Test whether the extractor is generally suitable for the given age limit"""
+        return not age_restricted(cls.age_limit, age_limit)
 
     @classmethod
     def description(cls, *, markdown=True, search_examples=None):
@@ -3745,11 +3742,15 @@ class InfoExtractor:
     def _get_automatic_captions(self, *args, **kwargs):
         raise NotImplementedError('This method must be implemented by subclasses')
 
+    @property
+    def _cookies_passed(self):
+        """Whether cookies have been passed to YoutubeDL"""
+        return self.get_param('cookiefile') is not None or self.get_param('cookiesfrombrowser') is not None
+
     def mark_watched(self, *args, **kwargs):
         if not self.get_param('mark_watched', False):
             return
-        if (self.supports_login() and self._get_login_info()[0] is not None
-                or self.get_param('cookiefile') or self.get_param('cookiesfrombrowser')):
+        if self.supports_login() and self._get_login_info()[0] is not None or self._cookies_passed:
             self._mark_watched(*args, **kwargs)
 
     def _mark_watched(self, *args, **kwargs):
diff --git a/yt_dlp/extractor/generic.py b/yt_dlp/extractor/generic.py
index 0d0e002e5..f594d02c2 100644
--- a/yt_dlp/extractor/generic.py
+++ b/yt_dlp/extractor/generic.py
@@ -4106,7 +4106,7 @@ class GenericIE(InfoExtractor):
             entries.append(entry_info_dict)
 
         if len(entries) == 1:
-            return entries[0]
+            return merge_dicts(entries[0], info_dict)
         else:
             for num, e in enumerate(entries, start=1):
                 # 'url' results don't have a title
diff --git a/yt_dlp/extractor/vimeo.py b/yt_dlp/extractor/vimeo.py
index de4fc61cc..59c5353ab 100644
--- a/yt_dlp/extractor/vimeo.py
+++ b/yt_dlp/extractor/vimeo.py
@@ -119,7 +119,7 @@ class VimeoBaseInfoExtractor(InfoExtractor):
 
     def _parse_config(self, config, video_id):
         video_data = config['video']
-        video_title = video_data['title']
+        video_title = video_data.get('title')
         live_event = video_data.get('live_event') or {}
         is_live = live_event.get('status') == 'started'
         request = config.get('request') or {}
diff --git a/yt_dlp/extractor/vk.py b/yt_dlp/extractor/vk.py
index 402508aa3..3b105e6c0 100644
--- a/yt_dlp/extractor/vk.py
+++ b/yt_dlp/extractor/vk.py
@@ -590,7 +590,6 @@ class VKWallPostIE(VKBaseIE):
         }],
         'params': {
             'skip_download': True,
-            'usenetrc': True,
         },
         'skip': 'Requires vk account credentials',
     }, {
@@ -601,9 +600,6 @@ class VKWallPostIE(VKBaseIE):
             'title': 'Сергей Горбунов - Wall post 85155021_6319',
         },
         'playlist_count': 1,
-        'params': {
-            'usenetrc': True,
-        },
         'skip': 'Requires vk account credentials',
     }, {
         # wall page URL
diff --git a/yt_dlp/extractor/youtube.py b/yt_dlp/extractor/youtube.py
index 345fc1e93..5546aa9a3 100644
--- a/yt_dlp/extractor/youtube.py
+++ b/yt_dlp/extractor/youtube.py
@@ -394,9 +394,7 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
         self._check_login_required()
 
     def _check_login_required(self):
-        if (self._LOGIN_REQUIRED
-                and self.get_param('cookiefile') is None
-                and self.get_param('cookiesfrombrowser') is None):
+        if self._LOGIN_REQUIRED and not self._cookies_passed:
             self.raise_login_required('Login details are needed to download this content', method='cookies')
 
     _YT_INITIAL_DATA_RE = r'(?:window\s*\[\s*["\']ytInitialData["\']\s*\]|ytInitialData)\s*=\s*({.+?})\s*;'
@@ -4282,8 +4280,7 @@ class YoutubeTabBaseInfoExtractor(YoutubeBaseInfoExtractor):
             start = next((i for i, v in enumerate(videos) if v['id'] == last_id), -1) + 1
             if start >= len(videos):
                 return
-            for video in videos[start:]:
-                yield video
+            yield from videos[start:]
             first_id = first_id or videos[0]['id']
             last_id = videos[-1]['id']
             watch_endpoint = try_get(
diff --git a/yt_dlp/extractor/zingmp3.py b/yt_dlp/extractor/zingmp3.py
index 26eddb06a..8b2d842ff 100644
--- a/yt_dlp/extractor/zingmp3.py
+++ b/yt_dlp/extractor/zingmp3.py
@@ -59,7 +59,7 @@ class ZingMp3BaseIE(InfoExtractor):
         return (resp or {}).get('data') or {}
 
     def _real_initialize(self):
-        if not self.get_param('cookiefile') and not self.get_param('cookiesfrombrowser'):
+        if not self._cookies_passed:
             self._request_webpage(
                 self._api_url('bai-hat', {'id': ''}), None, note='Updating cookies')