Set up isort in CI

.github/workflows/build.yml

@@ -75,6 +75,7 @@ jobs:
       matrix:
         toxenv:
           - flake8
+          - isort
 
     steps:
       - name: Git clone

setup.cfg

@@ -13,3 +13,17 @@ extend-ignore = E131
 ignore-bad-ideas =
   .#emacsjunk.py
   snake.egg-info
+
+[isort]
+# from X import (
+#   a,
+#   b,
+# )
+multi_line_output = 3
+include_trailing_comma = true
+lines_after_imports = 2
+reverse_relative = true
+default_section = THIRDPARTY
+known_first_party = findimports
+# known_third_party = pytest, ...
+# skip = filename...

setup.py

@@ -1,8 +1,9 @@
 #!/usr/bin/env python
 import ast
+import email.utils
 import os
 import re
-import email.utils
+
 from setuptools import setup
 
 

tests.py

@@ -1,12 +1,14 @@
 import os
 import unittest
+
+import findimports
+
+
 try:
     from cStringIO import StringIO
 except ImportError:
     from io import StringIO
 
-import findimports
-
 
 here = os.path.dirname(__file__)
 

testsuite.py

@@ -1,14 +1,14 @@
 #!/usr/bin/python
 
-import unittest
 import doctest
+import glob
+import linecache
 import os
 import re
+import shutil
 import sys
 import tempfile
-import shutil
-import glob
-import linecache
+import unittest
 
 
 class RedirectToStdout(object):

tox.ini

@@ -19,3 +19,8 @@ commands =
 deps = flake8
 skip_install = true
 commands = flake8 findimports.py setup.py tests.py testsuite.py
+
+[testenv:isort]
+deps = isort
+skip_install = true
+commands = isort {posargs: -c --diff findimports.py setup.py tests.py testsuite.py}