Merge branch 'youtube' into 'master'

[youtube] make sure the db directory is always a string

Closes #21

See merge request !47

bob/bio/video/annotator.py

@@ -129,7 +129,7 @@ class FailSafeVideo(Base):
 
     Parameters
     ----------
-    annotators : :any:`list`
+    annotators : list
         A list of annotators to try.
     max_age : int
         The maximum number of frames that an annotation is valid for next frames.

bob/bio/video/database/youtube.py

@@ -73,7 +73,7 @@ class YoutubeDatabase(Database):
         protocol,
         annotation_type="bounding-box",
         fixed_positions=None,
-        original_directory=rc.get("bob.bio.face.youtube.directory"),
+        original_directory=rc.get("bob.bio.video.youtube.directory", ""),
         extension=".jpg",
         annotation_extension=".labeled_faces.txt",
         frame_selector=None,
@@ -81,10 +81,11 @@ class YoutubeDatabase(Database):
 
         self._check_protocol(protocol)
 
-        if original_directory is None or not os.path.exists(original_directory):
+        original_directory = original_directory or ""
+        if not os.path.exists(original_directory):
             logger.warning(
                 "Invalid or non existant `original_directory`: f{original_directory}."
-                "Please, do `bob config set bob.bio.face.lfw.directory PATH` to set the LFW data directory."
+                "Please, do `bob config set bob.bio.video.youtube.directory PATH` to set the Youtube data directory."
             )
 
         urls = YoutubeDatabase.urls()