proper type annotation for filters in aiohttp_jinja2.setup (#331)

Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>

Author: rkdl

aiohttp_jinja2/__init__.py

@@ -7,6 +7,7 @@
 from aiohttp import web
 from aiohttp.abc import AbstractView
 from .helpers import GLOBAL_HELPERS
+from .typedefs import Filters
 
 
 __version__ = '1.2.0'
@@ -24,7 +25,7 @@ def setup(
     *args: Any,
     app_key: str = APP_KEY,
     context_processors: Iterable[Callable[[web.Request], Dict[str, Any]]] = (),
-    filters: Optional[Iterable[Callable[..., str]]] = None,
+    filters: Optional[Filters] = None,
     default_helpers: bool = True,
     **kwargs: Any
 ) -> jinja2.Environment:

aiohttp_jinja2/typedefs.py

@@ -0,0 +1,4 @@
+from typing import Callable, Union, Iterable, Tuple, Mapping
+
+Filter = Callable[..., str]
+Filters = Union[Iterable[Tuple[str, Filter]], Mapping[str, Filter]]