Fix for #26.

When a language tag is invalid, do not drop the label but set the language to
undetermined.

CHANGES.rst

@@ -1,3 +1,10 @@
+0.3.1 (2016-09-??)
+------------------
+
+- Handle a bug with private language tags. Currently not recognised by the
+  language_tags library. The Getty services do use them. When encountered, we
+  fall back to the undeterminded language. (#26)
+
 0.3.0 (2016-08-11)
 ------------------
 

docs/source/conf.py

@@ -59,7 +59,7 @@
 # The short X.Y version.
 version = '0.3'
 # The full version, including alpha/beta/rc tags.
-release = '0.3.0'
+release = '0.3.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

setup.py

@@ -21,7 +21,7 @@
 
 setup(
     name='skosprovider_getty',
-    version='0.3.0',
+    version='0.3.1',
     description='Skosprovider implementation of the Getty Vocabularies',
     long_description=README + '\n\n' + CHANGES,
     packages=packages,

skosprovider_getty/utils.py

@@ -164,7 +164,12 @@ def _create_label(literal, type):
     language = literal.language
     if language is None:
         language = 'und'
-    return Label(literal.toPython(), type, language)
+    try:
+        l = Label(literal.toPython(), type, language)
+    except ValueError as e:
+        log.warn(e)
+        l = label(literal.toPython(), type, 'und')
+    return l
 
 
 def _create_note(graph, uri, type, change_notes=False):