2 files changed, 17 insertions, 7 deletions
diff --git a/src/ee/digikey/doit.py b/src/ee/digikey/doit.py
index 6f7c2d5..0452530 100644
--- a/src/ee/digikey/doit.py
+++ b/src/ee/digikey/doit.py
@@ -142,9 +142,7 @@ def download_part_facts(output: DataSet, in_ds: DataSet):
 
             for a in product.attributes:
                 key = "{}/{}".format(a.attribute_type.id, a.attribute_type.label)
-                key = key.replace("%", "_")
-                value = a.value.replace("%", "%%")
-                o.set(key, value)
+                o.set(key, a.value)
 
 
 def task_digikey_fetch_full_part_facts():
diff --git a/src/ee/ds/__init__.py b/src/ee/ds/__init__.py
index 5b4da4d..026ab9b 100644
--- a/src/ee/ds/__init__.py
+++ b/src/ee/ds/__init__.py
@@ -15,7 +15,6 @@ class ObjectType(object):
     def __init__(self, name: str):
         self._name = name
         self._fields = []  # type: List[str]
-        self._objects = {}
 
     def __eq__(self, o) -> bool:
         other = o  # type: ObjectType
@@ -54,11 +53,24 @@ class ObjectType(object):
 
 
 class Object(object):
+    class ValueList(list):
+        """An auto-expanding version of list."""
+
+        def __setitem__(self, index, value):
+            if index >= len(self):
+                self.extend([None] * (index + 1 - len(self)))
+            list.__setitem__(self, index, value)
+
+        def __getitem__(self, index):
+            if index >= len(self):
+                self.extend([None] * (index + 1 - len(self)))
+            return list.__getitem__(self, index)
+
     def __init__(self, ds: "DataSet", ot: ObjectType, key: str):
         self._ds = ds
         self._ot = ot
         self._key = key
-        self._data = []
+        self._data = Object.ValueList()
 
     @property
     def object_type(self):
@@ -72,7 +84,7 @@ class Object(object):
         if self._ds._frozen:
             raise Exception("This data set is frozen")
         idx = self._ot.index_of(key, create=True)
-        self._data.insert(idx, value)
+        self._data[idx] = value
 
         return self
 
@@ -115,7 +127,7 @@ class Object(object):
 
     def get(self, key: str) -> Optional[str]:
         idx = self._ot.index_of(key)
-        return self._data[idx] if idx is not None and idx < len(self._data) else None
+        return self._data[idx] if idx is not None else None
 
     def get_req(self, key: str) -> str:
         idx = self._ot.index_of(key)