minor framework tidy

setup.py

@@ -1,14 +1,14 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-import os
 import sys
+from os import path
 
 from setuptools import setup
 
-src_dir = os.path.abspath(os.path.dirname(__file__))
+src_dir = path.abspath(path.dirname(__file__))
 if sys.argv[1].lower().strip() == 'make':  # exec Makefile commands
     import pymake
-    fpath = os.path.join(src_dir, 'Makefile')
+    fpath = path.join(src_dir, 'Makefile')
     pymake.main(['-f', fpath] + sys.argv[2:])
     # Stop to avoid setup.py raising non-standard command error
     sys.exit(0)

tox.ini

@@ -5,7 +5,7 @@
 
 [tox]
 # deprecation warning: py{34}
-envlist=py{27,34,35,36,37,38,39,py2,py3}{,-tf}{,-keras}, perf, flake8, setup.py
+envlist=py{27,34,35,36,37,38,39,py2,py3}{,-tf}{,-keras}, perf, setup.py
 isolated_build=True
 
 [coverage]