pass mypy type check

yuanx749 · yuanx749 · commit 20e5ebe06370 · 2024-06-03T13:24:10.000+08:00
diff --git a/pandas/core/strings/accessor.py b/pandas/core/strings/accessor.py
@@ -920,7 +920,7 @@ def split(
             )
         if is_re(pat):
             regex = True
-        elif pat is not None and regex is None:
+        elif isinstance(pat, str) and regex is None:
             # regex is None so link to old behavior #43563
             regex = len(pat) != 1
         result = self._data.array._str_split(pat, n, expand, regex)

Original file line number	Diff line number	Diff line change
`@@ -920,7 +920,7 @@ def split(`
`920`	`920`	`)`
`921`	`921`	`if is_re(pat):`
`922`	`922`	`regex = True`
`923`		`- elif pat is not None and regex is None:`
	`923`	`+ elif isinstance(pat, str) and regex is None:`
`924`	`924`	`# regex is None so link to old behavior #43563`
`925`	`925`	`regex = len(pat) != 1`
`926`	`926`	`result = self._data.array._str_split(pat, n, expand, regex)`