Add type annotation for filters

CHANGES.rst

@@ -1,5 +1,14 @@
 .. currentmodule:: jinja2
 
+Version 3.1.7
+-------------
+
+Unreleased
+
+-   Add type annotation to ``FILTERS`` and ``TESTS``
+    :issue:`2120`, :pr:`2141`
+
+
 Version 3.1.6
 -------------
 

src/jinja2/__init__.py

@@ -35,4 +35,4 @@
 from .utils import pass_eval_context as pass_eval_context
 from .utils import select_autoescape as select_autoescape
 
-__version__ = "3.1.6"
+__version__ = "3.1.7"

src/jinja2/filters.py

@@ -41,7 +41,7 @@ def __html__(self) -> str:
             pass
 
 
-F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+FilterFunction = t.Callable[..., t.Any]
 K = t.TypeVar("K")
 V = t.TypeVar("V")
 
@@ -1815,7 +1815,7 @@ async def async_select_or_reject(
                 yield item
 
 
-FILTERS = {
+FILTERS: t.Dict[str, FilterFunction] = {
     "abs": abs,
     "attr": do_attr,
     "batch": do_batch,

src/jinja2/tests.py

@@ -12,6 +12,9 @@
     from .environment import Environment
 
 
+TestFunction = t.Callable[..., t.Any]
+
+
 def test_odd(value: int) -> bool:
     """Return true if the variable is odd."""
     return value % 2 == 1
@@ -213,7 +216,7 @@ def test_in(value: t.Any, seq: t.Container[t.Any]) -> bool:
     return value in seq
 
 
-TESTS = {
+TESTS: t.Dict[str, TestFunction] = {
     "odd": test_odd,
     "even": test_even,
     "divisibleby": test_divisibleby,