Python 3: fix glance.tests.functional.db.test_sqlalchemy

This patch fixes 3 issues:
- "RuntimeError: dictionary changed size during iteration"
- "TypeError: 'map' object is not subscriptable"
- "TypeError: object of type 'map' has no len()"

Change-Id: If52ab336512f37b6e5ad6c748bef7996c67cb71a

glance/db/sqlalchemy/api.py

@@ -1412,7 +1412,7 @@ def task_create(context, values, session=None):
 
 def _pop_task_info_values(values):
     task_info_values = {}
-    for k, v in values.items():
+    for k, v in list(values.items()):
         if k in ['input', 'result', 'message']:
             values.pop(k)
             task_info_values[k] = v

glance/db/sqlalchemy/glare.py

@@ -253,8 +253,8 @@ def get_all(context, session, marker=None, limit=None,
         context, session, filters, marker,
         limit, sort_keys, sort_dirs, show_level)
 
-    return map(lambda ns: _out(ns, show_level, show_text_properties=False),
-               artifacts)
+    return [_out(ns, show_level, show_text_properties=False)
+            for ns in artifacts]
 
 
 def _get_all(context, session, filters=None, marker=None,

glance/db/sqlalchemy/metadef_api/namespace.py

@@ -206,7 +206,7 @@ def get_all(context, session, marker=None, limit=None,
         namespaces = _get_all(
             context, session, filters, marker, limit, sort_key, sort_dir)
 
-    return map(lambda ns: ns.to_dict(), namespaces)
+    return [ns.to_dict() for ns in namespaces]
 
 
 def get(context, name, session):

tox.ini

@@ -43,6 +43,7 @@ commands =
     glance.tests.functional.test_cors_middleware \
     glance.tests.functional.test_logging \
     glance.tests.functional.db.test_simple \
+    glance.tests.functional.db.test_sqlalchemy \
     glance.tests.functional.db.test_rpc_endpoint \
     glance.tests.functional.v1.test_multiprocessing \
     glance.tests.functional.v2.test_metadef_objects \