Fix mypy and Windows path error

Author: leonarduschen

pandas/io/common.py

@@ -714,7 +714,7 @@ def get_handle(
         assert not isinstance(handle, str)
         handles.append(handle)
 
-    elif is_path:
+    elif isinstance(handle, str):
         # Check whether the filename is to be opened in binary mode.
         # Binary mode does not support 'encoding' and 'newline'.
         if ioargs.encoding and "b" not in ioargs.mode:

pandas/tests/io/xml/test_to_xml.py

@@ -5,6 +5,7 @@
     StringIO,
 )
 import os
+from pathlib import Path
 
 import numpy as np
 import pytest
@@ -202,14 +203,14 @@ def test_str_output(datapath, parser):
 
 
 def test_wrong_file_path(parser):
-    fpath = "/my/fake/path/output.xml"
-    dirname = os.path.dirname(fpath)
+    path = "/my/fake/path/output.xml"
+    parent = Path(path).parent
 
     with pytest.raises(
         OSError,
-        match=(fr"Cannot save file into a non-existent directory: '{dirname}'"),
+        match=(fr"Cannot save file into a non-existent directory: '{parent}'"),
     ):
-        geom_df.to_xml(fpath, parser=parser)
+        geom_df.to_xml(path, parser=parser)
 
 
 # INDEX