New features from python 2.7

After bump minimum supported version to 2.7 (1da9d3752160430c91534a8868ceb8c5ad1451d4), we can use new syntax.

Change-Id: Ib064c75a00562e641d132f9c57e5e69744200e05
Pull-request: https://github.com/zzzeek/sqlalchemy/pull/347

2 files changed, 3 insertions, 3 deletions

diff --git a/lib/sqlalchemy/ext/automap.py b/lib/sqlalchemy/ext/automap.py
index 219bfe124..14599fe5e 100644
--- a/lib/sqlalchemy/ext/automap.py
+++ b/lib/sqlalchemy/ext/automap.py
@@ -906,7 +906,7 @@ def _relationships_for_fks(automap_base, map_config, table_to_map_config,
             )
 
             o2m_kws = {}
-            nullable = False not in set([fk.parent.nullable for fk in fks])
+            nullable = False not in {fk.parent.nullable for fk in fks}
             if not nullable:
                 o2m_kws['cascade'] = "all, delete-orphan"
 
diff --git a/lib/sqlalchemy/ext/mutable.py b/lib/sqlalchemy/ext/mutable.py
index 3361c4475..79459b39c 100644
--- a/lib/sqlalchemy/ext/mutable.py
+++ b/lib/sqlalchemy/ext/mutable.py
@@ -421,7 +421,7 @@ class MutableBase(object):
         .. versionadded:: 1.0.5
 
         """
-        return set([attribute.key])
+        return {attribute.key}
 
     @classmethod
     def _listen_on_attribute(cls, attribute, coerce, parent_cls):
@@ -605,7 +605,7 @@ class MutableComposite(MutableBase):
 
     @classmethod
     def _get_listen_keys(cls, attribute):
-        return set([attribute.key]).union(attribute.property._attribute_keys)
+        return {attribute.key}.union(attribute.property._attribute_keys)
 
     def changed(self):
         """Subclasses should call this method whenever change events occur."""