Replace py3.12 types with TypeAliases

myzhang1029 · myzhang1029 · commit 02bd2ac8001f · 2026-06-06T16:35:32.000-04:00
diff --git a/lib/matplotlib/backends/backend_pdf.pyi b/lib/matplotlib/backends/backend_pdf.pyi
@@ -2,7 +2,7 @@ import os
 from datetime import datetime
 from enum import Enum
 from functools import total_ordering
-from typing import IO, Any, Protocol, Self
+from typing import IO, Any, Protocol, Self, TypeAlias
 
 import numpy as np
 from _typeshed import ReadableBuffer, SupportsWrite
@@ -17,7 +17,7 @@ from . import _backend_pdf_ps
 class _SupportsPdfRepr(Protocol):
     def pdfRepr(self) -> bytes: ...
 
-type _SupportsPdfReprExt = (
+_SupportsPdfReprExt: TypeAlias = (
     _SupportsPdfRepr
     | float
     | np.floating
@@ -34,7 +34,7 @@ type _SupportsPdfReprExt = (
     | BboxBase
 )
 
-type _MetadataDict = dict[str, str | datetime | Name]
+_MetadataDict: TypeAlias = dict[str, str | datetime | Name]
 
 def pdfRepr(obj: _SupportsPdfReprExt) -> bytes: ...
 
