support pycountry if iso-639 is not available

cps/isoLanguages.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+
+try:
+    from iso639 import languages, __version__
+    get = languages.get
+except ImportError:
+    from pycountry import languages as pyc_languages
+    try:
+        import pkg_resources
+        __version__ = pkg_resources.get_distribution('pycountry').version + ' (PyCountry)'
+        del pkg_resources
+    except:
+        __version__ = "? (PyCountry)"
+
+    def _copy_fields(l):
+        l.part1 = l.alpha_2
+        l.part3 = l.alpha_3
+        return l
+
+    def get(name=None, part1=None, part3=None):
+        if (part3 is not None):
+            return _copy_fields(pyc_languages.get(alpha_3=part3))
+        if (part1 is not None):
+            return _copy_fields(pyc_languages.get(alpha_2=part1))
+        if (name is not None):
+            return _copy_fields(pyc_languages.get(name=name))