Improve error handling logic, follow code conventions

youtube_dl/extractor/funimation.py

@@ -110,24 +110,18 @@ class FunimationIE(InfoExtractor):
             headers = {}
             if self._TOKEN:
                 headers['Authorization'] = 'Token %s' % self._TOKEN
-            try:
-                sources = self._download_json(
-                    'https://www.funimation.com/api/showexperience/%s/' % video_id,
-                    video_id, headers=headers, query={
-                        'pinst_id': ''.join([random.choice(string.digits + string.ascii_letters) for _ in range(8)]),
-                    })
-                sources = sources['items']
-            except KeyError:
-                if 'errors' in sources:
-                    errors = sources['errors']
-                    if len(errors) > 0:
-                        error = errors[0]
-                        if 'detail' in error:
-                            detail = error['detail']
-                            raise ExtractorError('%s said: %s' % (
-                                self.IE_NAME, detail), expected=True)
-                        else:
-                            raise ExtractorError(error, expected=True)
+            meta = self._download_json(
+                'https://www.funimation.com/api/showexperience/%s/' % video_id,
+                video_id, headers=headers, query={
+                    'pinst_id': ''.join([random.choice(string.digits + string.ascii_letters) for _ in range(8)]),
+                })
+            sources = meta.get('items') or []
+            errors = meta.get('errors')
+            if errors:
+                if isinstance(errors, list):
+                    raise ExtractorError('\nERROR: '.join([error.get('detail') or error.get('title') or str(error) for error in errors]), expected=True)
+                else:
+                    raise ExtractorError(errors, expected=True)
         except ExtractorError as e:
             if isinstance(e.cause, compat_HTTPError) and e.cause.code == 403:
                 error = self._parse_json(e.cause.read(), video_id)['errors'][0]