use pathlib in utils/openpy.py

IPython/utils/openpy.py

@@ -7,6 +7,7 b' Much of the code is taken from the tokenize module in Python 3.2.'
 
 import io
 from io import TextIOWrapper, BytesIO
+from pathlib import Path
 import re
 from tokenize import open, detect_encoding
 
@@ -72,11 +73,12 b' def read_py_file(filename, skip_encoding_cookie=True):'
     -------
     A unicode string containing the contents of the file.
     """
-    with open(filename) as f:   # the open function defined in this module.
+    filepath = Path(filename)
+    with filepath.open() as f:   # the open function defined in this module.
         if skip_encoding_cookie:
             return "".join(strip_encoding_cookie(f))
         else:
-            return f.read()
+            return filepath.read_text()
 
 def read_py_url(url, errors='replace', skip_encoding_cookie=True):
     """Read a Python file from a URL, using the encoding declared inside the file.