Use inspect(), not Inspector.from_engine()

The internal inspection routines no longer use SQLAlchemy's
``Inspector.from_engine()`` method, which is expected to be deprecated in
1.4.  The ``inspect()`` function is now used.

Change-Id: I81ea16e5d750d8c48d8db1a5098815988ea60f6c

2 files changed, 4 insertions, 4 deletions

diff --git a/alembic/autogenerate/api.py b/alembic/autogenerate/api.py
index db929d0..2902f80 100644
--- a/alembic/autogenerate/api.py
+++ b/alembic/autogenerate/api.py
@@ -3,7 +3,7 @@ automatically."""
 
 import contextlib
 
-from sqlalchemy.engine.reflection import Inspector
+from sqlalchemy import inspect
 
 from . import compare
 from . import render
@@ -316,7 +316,7 @@ class AutogenContext(object):
 
     @util.memoized_property
     def inspector(self):
-        return Inspector.from_engine(self.connection)
+        return inspect(self.connection)
 
     @contextlib.contextmanager
     def _within_batch(self):
diff --git a/alembic/autogenerate/compare.py b/alembic/autogenerate/compare.py
index 92df3fc..8429b66 100644
--- a/alembic/autogenerate/compare.py
+++ b/alembic/autogenerate/compare.py
@@ -3,9 +3,9 @@ import logging
 import re
 
 from sqlalchemy import event
+from sqlalchemy import inspect
 from sqlalchemy import schema as sa_schema
 from sqlalchemy import types as sqltypes
-from sqlalchemy.engine.reflection import Inspector
 from sqlalchemy.util import OrderedSet
 
 from alembic.ddl.base import _fk_spec
@@ -34,7 +34,7 @@ def _produce_net_changes(autogen_context, upgrade_ops):
     connection = autogen_context.connection
     include_schemas = autogen_context.opts.get("include_schemas", False)
 
-    inspector = Inspector.from_engine(connection)
+    inspector = inspect(connection)
 
     default_schema = connection.dialect.default_schema_name
     if include_schemas: