Random cleanups and type safety. Created ml subdir.

1 files changed, 3 insertions, 3 deletions

diff --git a/acl.py b/acl.py
index e6bb903..9155090 100644
--- a/acl.py
+++ b/acl.py
@@ -5,7 +5,7 @@ import enum
 import fnmatch
 import logging
 import re
-from typing import Any, Callable, List, Optional, Set
+from typing import Any, Callable, List, Optional, Set, Sequence
 
 # This module is commonly used by others in here and should avoid
 # taking any unnecessary dependencies back on them.
@@ -134,8 +134,8 @@ class PredicateListBasedACL(SimpleACL):
     """An ACL that allows or denies by applying predicates."""
     def __init__(self,
                  *,
-                 allow_predicate_list: List[Callable[[Any], bool]] = None,
-                 deny_predicate_list: List[Callable[[Any], bool]] = None,
+                 allow_predicate_list: Sequence[Callable[[Any], bool]] = None,
+                 deny_predicate_list: Sequence[Callable[[Any], bool]] = None,
                  order_to_check_allow_deny: Order,
                  default_answer: bool) -> None:
         super().__init__(