fix: allow array-like fill_between where masks (#31898)

cyphercodes · web-flow · commit 15a8b9940e98 · 2026-06-17T19:55:30.000-06:00
* fix: allow array-like fill_between where masks

* fix: update pyplot boilerplate for fill_between typing

---------

Co-authored-by: cyphercodes &lt;cyphercodes@users.noreply.github.com&gt;
diff --git a/lib/matplotlib/axes/_axes.pyi b/lib/matplotlib/axes/_axes.pyi
@@ -482,7 +482,7 @@ class Axes(_AxesBase):
         x: ArrayLike,
         y1: ArrayLike | float,
         y2: ArrayLike | float = ...,
-        where: Sequence[bool] | None = ...,
+        where: ArrayLike | None = ...,
         interpolate: bool = ...,
         step: Literal["pre", "post", "mid"] | None = ...,
         *,
@@ -494,7 +494,7 @@ class Axes(_AxesBase):
         y: ArrayLike,
         x1: ArrayLike | float,
         x2: ArrayLike | float = ...,
-        where: Sequence[bool] | None = ...,
+        where: ArrayLike | None = ...,
         step: Literal["pre", "post", "mid"] | None = ...,
         interpolate: bool = ...,
         *,
diff --git a/lib/matplotlib/pyplot.py b/lib/matplotlib/pyplot.py
@@ -3499,7 +3499,7 @@ def fill_between(
     x: ArrayLike,
     y1: ArrayLike | float,
     y2: ArrayLike | float = 0,
-    where: Sequence[bool] | None = None,
+    where: ArrayLike | None = None,
     interpolate: bool = False,
     step: Literal["pre", "post", "mid"] | None = None,
     *,
@@ -3524,7 +3524,7 @@ def fill_betweenx(
     y: ArrayLike,
     x1: ArrayLike | float,
     x2: ArrayLike | float = 0,
-    where: Sequence[bool] | None = None,
+    where: ArrayLike | None = None,
     step: Literal["pre", "post", "mid"] | None = None,
     interpolate: bool = False,
     *,
