pep-484 for sqlalchemy.event; use future annotations

__future__.annotations mode allows us to use non-string
annotations for argument and return types in most cases,
but more importantly it removes a large amount of runtime
overhead that would be spent in evaluating the annotations.

Change-Id: I2f5b6126fe0019713fc50001be3627b664019ede
References: #6810

7 files changed, 14 insertions, 0 deletions

diff --git a/lib/sqlalchemy/ext/mypy/apply.py b/lib/sqlalchemy/ext/mypy/apply.py
index 4e244b5b9..bfc3459d0 100644
--- a/lib/sqlalchemy/ext/mypy/apply.py
+++ b/lib/sqlalchemy/ext/mypy/apply.py
@@ -5,6 +5,8 @@
 # This module is part of SQLAlchemy and is released under
 # the MIT License: https://www.opensource.org/licenses/mit-license.php
 
+from __future__ import annotations
+
 from typing import List
 from typing import Optional
 from typing import Union
diff --git a/lib/sqlalchemy/ext/mypy/decl_class.py b/lib/sqlalchemy/ext/mypy/decl_class.py
index bd6c6f41e..13ba2e666 100644
--- a/lib/sqlalchemy/ext/mypy/decl_class.py
+++ b/lib/sqlalchemy/ext/mypy/decl_class.py
@@ -5,6 +5,8 @@
 # This module is part of SQLAlchemy and is released under
 # the MIT License: https://www.opensource.org/licenses/mit-license.php
 
+from __future__ import annotations
+
 from typing import List
 from typing import Optional
 from typing import Union
diff --git a/lib/sqlalchemy/ext/mypy/infer.py b/lib/sqlalchemy/ext/mypy/infer.py
index 6a5e99e48..08035d74c 100644
--- a/lib/sqlalchemy/ext/mypy/infer.py
+++ b/lib/sqlalchemy/ext/mypy/infer.py
@@ -5,6 +5,8 @@
 # This module is part of SQLAlchemy and is released under
 # the MIT License: https://www.opensource.org/licenses/mit-license.php
 
+from __future__ import annotations
+
 from typing import Optional
 from typing import Sequence
 
diff --git a/lib/sqlalchemy/ext/mypy/names.py b/lib/sqlalchemy/ext/mypy/names.py
index ad4449e5b..8232ca6db 100644
--- a/lib/sqlalchemy/ext/mypy/names.py
+++ b/lib/sqlalchemy/ext/mypy/names.py
@@ -5,6 +5,8 @@
 # This module is part of SQLAlchemy and is released under
 # the MIT License: https://www.opensource.org/licenses/mit-license.php
 
+from __future__ import annotations
+
 from typing import Dict
 from typing import List
 from typing import Optional
diff --git a/lib/sqlalchemy/ext/mypy/plugin.py b/lib/sqlalchemy/ext/mypy/plugin.py
index c9520fef3..3a78ab188 100644
--- a/lib/sqlalchemy/ext/mypy/plugin.py
+++ b/lib/sqlalchemy/ext/mypy/plugin.py
@@ -9,6 +9,8 @@
 Mypy plugin for SQLAlchemy ORM.
 
 """
+from __future__ import annotations
+
 from typing import Callable
 from typing import List
 from typing import Optional
diff --git a/lib/sqlalchemy/ext/mypy/util.py b/lib/sqlalchemy/ext/mypy/util.py
index 741772eac..943c71b36 100644
--- a/lib/sqlalchemy/ext/mypy/util.py
+++ b/lib/sqlalchemy/ext/mypy/util.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import re
 from typing import Any
 from typing import Iterable
diff --git a/lib/sqlalchemy/ext/orderinglist.py b/lib/sqlalchemy/ext/orderinglist.py
index 5384851b1..612b62724 100644
--- a/lib/sqlalchemy/ext/orderinglist.py
+++ b/lib/sqlalchemy/ext/orderinglist.py
@@ -119,6 +119,8 @@ start numbering at 1 or some other integer, provide ``count_from=1``.
 
 
 """
+from __future__ import annotations
+
 from typing import Callable
 from typing import List
 from typing import Optional