diff --git a/resources/lib/dropbox/oauth.py b/resources/lib/dropbox/oauth.py
index be46b40..c51f870 100644
--- a/resources/lib/dropbox/oauth.py
+++ b/resources/lib/dropbox/oauth.py
@@ -511,9 +511,5 @@ def _params_to_urlencoded(params):
             else:
                 return str(o).encode('utf-8')
 
-    #fix for python 2.6
-    utf8_params = {}
-    for k,v in six.iteritems(params):
-        utf8_params[encode(k)] = encode(v)
-
+    utf8_params = {encode(k): encode(v) for k, v in six.iteritems(params)}
     return url_encode(utf8_params)
diff --git a/resources/lib/dropbox/stone_serializers.py b/resources/lib/dropbox/stone_serializers.py
index 3fe68b1..e4be3fa 100644
--- a/resources/lib/dropbox/stone_serializers.py
+++ b/resources/lib/dropbox/stone_serializers.py
@@ -237,12 +237,11 @@ class StoneToPythonPrimitiveSerializer(StoneSerializerBase):
     def encode_map(self, validator, value):
         validated_value = validator.validate(value)
 
-        #fix for python 2.6
-        result = {}
-        for key, value in validated_value.items():
-            result[self.encode_sub(validator.key_validator,key)] = self.encode_sub(validator.value_validator, value)
-
-        return result
+        return {
+            self.encode_sub(validator.key_validator, key):
+                self.encode_sub(validator.value_validator, value) for
+            key, value in validated_value.items()
+        }
 
     def encode_nullable(self, validator, value):
         if value is None:
@@ -831,12 +830,11 @@ def _decode_list(
     if not isinstance(obj, list):
         raise bv.ValidationError(
             'expected list, got %s' % bv.generic_type_name(obj))
-
-    result = []
-    for item in obj:
-        result.append(_json_compat_obj_decode_helper(data_type.item_validator, item, alias_validators, strict,old_style, for_msgpack))
-    
-    return result
+    return [
+        _json_compat_obj_decode_helper(
+            data_type.item_validator, item, alias_validators, strict,
+            old_style, for_msgpack)
+        for item in obj]
 
 
 def _decode_map(
@@ -848,12 +846,15 @@ def _decode_map(
     if not isinstance(obj, dict):
         raise bv.ValidationError(
             'expected dict, got %s' % bv.generic_type_name(obj))
-
-    result = {}
-    for key, value in obj.items():
-        result[_json_compat_obj_decode_helper(data_type.key_validator, key, alias_validators, strict,old_style, for_msgpack)] = _json_compat_obj_decode_helper(data_type.value_validator, value, alias_validators, strict,old_style, for_msgpack)
-
-    return result
+    return {
+        _json_compat_obj_decode_helper(
+            data_type.key_validator, key, alias_validators, strict,
+            old_style, for_msgpack):
+        _json_compat_obj_decode_helper(
+            data_type.value_validator, value, alias_validators, strict,
+            old_style, for_msgpack)
+        for key, value in obj.items()
+    }
 
 
 def _decode_nullable(
diff --git a/resources/lib/dropbox/stone_validators.py b/resources/lib/dropbox/stone_validators.py
index 3e9bc22..f919dc7 100644
--- a/resources/lib/dropbox/stone_validators.py
+++ b/resources/lib/dropbox/stone_validators.py
@@ -422,13 +422,10 @@ class Map(Composite):
     def validate(self, val):
         if not isinstance(val, dict):
             raise ValidationError('%r is not a valid dict' % val)
-
-        #fix for python 2.6
-        result = {}
-        for key, value in val.items():
-            result[self.key_validator.validate(key)] = self.value_validator.validate(value)
-        
-        return result
+        return {
+            self.key_validator.validate(key):
+                self.value_validator.validate(value) for key, value in val.items()
+        }
 
 
 class Struct(Composite):