replacing os.path with pathlib

setup.py

@@ -9,9 +9,8 @@
 import re
 import ast
 import os
-import os.path
 import sys
-
+from pathlib import Path
 # Add repo root to path so we can import scripts. Prior to PEP517 support this
 # was the default behavior for setuptools.
 # https://github.com/pypa/setuptools/issues/3939#issuecomment-1573619382
@@ -25,7 +24,7 @@ import setuptools
 
 
 try:
-    BASEDIR = os.path.dirname(os.path.realpath(__file__))
+    BASEDIR = Path(__file__).resolve().parent
 except NameError:
     BASEDIR = None
 
@@ -50,8 +49,8 @@ def _get_constant(name):
         The value of the argument.
     """
     field_re = re.compile(r'__{}__\s+=\s+(.*)'.format(re.escape(name)))
-    path = os.path.join(BASEDIR, 'qutebrowser', '__init__.py')
-    line = field_re.search(read_file(path)).group(1)
+    init_path = BASEDIR / 'qutebrowser' / '__init__.py'
+    line = field_re.search(read_file(init_path)).group(1)
     value = ast.literal_eval(line)
     return value
 
@@ -99,6 +98,6 @@ try:
     )
 finally:
     if BASEDIR is not None:
-        path = os.path.join(BASEDIR, 'qutebrowser', 'git-commit-id')
-        if os.path.exists(path):
-            os.remove(path)
+        git_commit_id_path = BASEDIR / 'qutebrowser' / 'git-commit-id'
+        if git_commit_id_path.exists():
+            git_commit_id_path.unlink()