- squash merge of ticket_302 branch

- The internal system for Alembic operations has been reworked to now
build upon an extensible system of operation objects.  New operations
can be added to the ``op.`` namespace, including that they are
available in custom autogenerate schemes.  fixes #302
- The internal system for autogenerate been reworked to build upon
the extensible system of operation objects present in #302.
A new customization hook process_revision_directives is added
to allow manipulation of the autogen stream.  Fixes #301

1 files changed, 2 insertions, 1 deletions

diff --git a/alembic/testing/exclusions.py b/alembic/testing/exclusions.py
index 88df9fc..90f8bc6 100644
--- a/alembic/testing/exclusions.py
+++ b/alembic/testing/exclusions.py
@@ -14,11 +14,12 @@ from .plugin.plugin_base import SkipTest
 from sqlalchemy.util import decorator
 from . import config
 from sqlalchemy import util
-from alembic import compat
+from ..util import compat
 import inspect
 import contextlib
 from .compat import get_url_driver_name, get_url_backend_name
 
+
 def skip_if(predicate, reason=None):
     rule = compound()
     pred = _as_predicate(predicate, reason)