fix: fix black-check errors (#2341)

Co-authored-by: Wang Napieralski <[email protected]>

Author: icywang86rui

tox.ini

@@ -126,12 +126,18 @@ commands = doc8
 
 [testenv:black-format]
 # Used during development (before committing) to format .py files.
+setenv =
+    LC_ALL=C.UTF-8
+    LANG=C.UTF-8
 deps = black
 commands =
     black -l 100 ./
 
 [testenv:black-check]
 # Used by automated build steps to check that all files are properly formatted.
+setenv =
+    LC_ALL=C.UTF-8
+    LANG=C.UTF-8
 deps = black
 commands =
     black -l 100 --check ./