[SEBA-412] Automated reformat of Python code

Passes of modernize, autopep8, black, then check with flake8

flake8 + manual fixes:
  lib/xos-config
  lib/xos-kafka
  lib/xos-util
  xos/coreapi
  xos/api
  xos/xos_client

Change-Id: Ib23cf84cb13beb3c6381fa0d79594dc9131dc815
diff --git a/lib/xos-genx/xos-genx-tests/test_cli.py b/lib/xos-genx/xos-genx-tests/test_cli.py
index 4beef06..3f94865 100644
--- a/lib/xos-genx/xos-genx-tests/test_cli.py
+++ b/lib/xos-genx/xos-genx-tests/test_cli.py
@@ -1,4 +1,3 @@
-
 # Copyright 2017-present Open Networking Foundation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -19,33 +18,39 @@
 from mock import patch
 from xosgenx.xosgen import XosGen
 
+
 class Args:
     pass
 
+
 class XOSProcessorTest(unittest.TestCase):
     """
     Testing the CLI binding for the XOS Generative Toolchain
     """
 
     def setUp(self):
-        os.chdir(os.path.join(os.path.abspath(os.path.dirname(os.path.realpath(__file__))), "..")) 
+        os.chdir(
+            os.path.join(
+                os.path.abspath(os.path.dirname(os.path.realpath(__file__))), ".."
+            )
+        )
 
     def test_generator(self):
         """
         [XOS-GenX] The CLI entry point should correctly parse params
         """
         args = Args()
-        args.files = ['xos-genx-tests/xproto/test.xproto']
-        args.target = 'xos-genx-tests/xtarget/test.xtarget'
-        args.output = 'xos-genx-tests/out/dir/'
+        args.files = ["xos-genx-tests/xproto/test.xproto"]
+        args.target = "xos-genx-tests/xtarget/test.xtarget"
+        args.output = "xos-genx-tests/out/dir/"
         args.write_to_file = "target"
         args.dest_file = None
         args.dest_extension = None
 
         expected_args = Args()
-        expected_args.files = [os.path.abspath(os.getcwd() + '/' + args.files[0])]
-        expected_args.target = os.path.abspath(os.getcwd() + '/' + args.target)
-        expected_args.output = os.path.abspath(os.getcwd() + '/' + args.output)
+        expected_args.files = [os.path.abspath(os.getcwd() + "/" + args.files[0])]
+        expected_args.target = os.path.abspath(os.getcwd() + "/" + args.target)
+        expected_args.output = os.path.abspath(os.getcwd() + "/" + args.output)
 
         with patch("xosgenx.xosgen.XOSProcessor.process") as generator:
             XosGen.init(args)
@@ -53,5 +58,6 @@
             self.assertEqual(actual_args.files, expected_args.files)
             self.assertEqual(actual_args.output, expected_args.output)
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     unittest.main()