Add Union for multiple type info

Co-authored-by: Kyle Sunden <[email protected]>

Author: devRD

lib/matplotlib/_mathtext_data.py

@@ -3,7 +3,7 @@
 """
 
 from __future__ import annotations
-from typing import overload
+from typing import overload, Union
 
 latex_to_bakoma = {
     '\\__sqrt__'                 : ('cmex10', 0x70),
@@ -1113,11 +1113,11 @@
 # Each element is a 4-tuple of the form:
 #   src_start, src_end, dst_font, dst_start
 
-_EntryTypeIn = tuple[str, str, str, str | int]
+_EntryTypeIn = tuple[str, str, str, Union[str, int]]
 _EntryTypeOut = tuple[int, int, str, int]
 
-_stix_virtual_fonts: dict[str, dict[str, list[_EntryTypeIn]] |
-                               list[_EntryTypeIn]] = {
+_stix_virtual_fonts: dict[str, Union[dict[
+    str, list[_EntryTypeIn]], list[_EntryTypeIn]]] = {
     'bb':
         {
         "rm":
@@ -1744,7 +1744,8 @@ def _normalize_stix_fontcodes(d):
         return {k: _normalize_stix_fontcodes(v) for k, v in d.items()}
 
 
-stix_virtual_fonts: dict[str, dict[str, list[_EntryTypeOut]] | list[_EntryTypeOut]]
+stix_virtual_fonts: dict[str, Union[dict[str, list[_EntryTypeOut]],
+                                    list[_EntryTypeOut]]]
 stix_virtual_fonts = _normalize_stix_fontcodes(_stix_virtual_fonts)
 
 # Free redundant list now that it has been normalized