Use pathlib instead of os in IPython/lib/hooks

IPython/core/hooks.py

@@ -35,9 +35,9 @@ def load_ipython_extension(ip):
 # the file COPYING, distributed as part of this software.
 #*****************************************************************************
 
-import os
 import subprocess
 import sys
+from pathlib import Path
 
 from .error import TryNext
 
@@ -75,7 +75,7 @@ def editor(self, filename, linenum=None, wait=True):
  linemark = '+%d' % int(linenum)
 
  # Enclose in quotes if necessary and legal
- if ' ' in editor and os.path.isfile(editor) and editor[0] != '"':
+ if " " in editor and Path(editor).is_file() and editor[0] != '"':
  editor = '"%s"' % editor
 
  # Call the actual editor