Clean json returned from server for keys with None values

Add testing

jellyfin_kodi/jellyfin/utils.py

@@ -0,0 +1,43 @@
+from six import string_types
+from six.moves import collections_abc
+
+
+def clean_none_dict_values(obj):
+    """
+    Recursively remove keys with a value of None
+    """
+    if not isinstance(obj, collections_abc.Iterable) or isinstance(obj, string_types):
+        return obj
+
+    queue = [obj]
+
+    while queue:
+        item = queue.pop()
+
+        if isinstance(item, collections_abc.Mapping):
+            mutable = isinstance(item, collections_abc.MutableMapping)
+            remove = []
+
+            for key, value in item.items():
+                if value is None and mutable:
+                    remove.append(key)
+
+                elif isinstance(value, string_types):
+                    continue
+
+                elif isinstance(value, collections_abc.Iterable):
+                    queue.append(value)
+
+            if mutable:
+                # Remove keys with None value
+                for key in remove:
+                    item.pop(key)
+
+        elif isinstance(item, collections_abc.Iterable):
+            for value in item:
+                if value is None or isinstance(value, string_types):
+                    continue
+                elif isinstance(value, collections_abc.Iterable):
+                    queue.append(value)
+
+    return obj