[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_target.py b/lib/xos-genx/xos-genx-tests/test_target.py
index d729be7..c468018 100644
--- a/lib/xos-genx/xos-genx-tests/test_target.py
+++ b/lib/xos-genx/xos-genx-tests/test_target.py
@@ -1,4 +1,3 @@
-
 # Copyright 2017-present Open Networking Foundation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -23,24 +22,25 @@
 
 TEST_OUTPUT = "Do re mi fa so la ti do"
 
-class XProtoTargetTests(unittest.TestCase):
 
+class XProtoTargetTests(unittest.TestCase):
     def setUp(self):
-        test_file = open(os.path.join(OUTPUT_DIR, TEST_FILE), 'w')
+        test_file = open(os.path.join(OUTPUT_DIR, TEST_FILE), "w")
         test_file.write(TEST_OUTPUT)
         test_file.close()
 
     def test_file_methods(self):
         target = XProtoTestHelpers.write_tmp_target(
-"""
+            """
   {%% if file_exists("%s") %%}
     {{ include_file("%s") }}
   {%% endif %%}
-"""%(TEST_FILE, TEST_FILE)
+"""
+            % (TEST_FILE, TEST_FILE)
         )
 
         args = XOSProcessorArgs()
-        args.inputs = ''
+        args.inputs = ""
         args.target = target
         args.attic = OUTPUT_DIR
         output = XOSProcessor.process(args)
@@ -48,30 +48,31 @@
 
     def test_xproto_lib(self):
         target = XProtoTestHelpers.write_tmp_target(
-"""
+            """
   {{ xproto_first_non_empty([None, None, None, None, None, None, "Eureka"]) }}
-""")
+"""
+        )
         args = XOSProcessorArgs()
-        args.inputs = ''
+        args.inputs = ""
         args.target = target
         output = XOSProcessor.process(args)
         self.assertIn("Eureka", output)
 
     def test_context(self):
         target = XProtoTestHelpers.write_tmp_target(
-"""
+            """
   {{ context.what }}
-""")
+"""
+        )
         args = XOSProcessorArgs()
-        args.inputs = ''
+        args.inputs = ""
         args.target = target
-        args.kv='what:what is what'
+        args.kv = "what:what is what"
         output = XOSProcessor.process(args)
         self.assertIn("what is what", output)
 
     def test_singularize(self):
-        proto = \
-"""
+        proto = """
   message TestSingularize {
       // The following field has an explicitly specified singular
       required int many = 1 [singular = "one"];
@@ -84,20 +85,22 @@
 """
 
         target = XProtoTestHelpers.write_tmp_target(
-"""
+            """
 {% for m in proto.messages.0.fields -%}
 {{ xproto_singularize(m) }},
 {%- endfor %}
-""")
+"""
+        )
         args = XOSProcessorArgs()
         args.inputs = proto
         args.target = target
         output = XOSProcessor.process(args)
-        self.assertEqual("one,sheep,slice,network,omf_friendly", output.lstrip().rstrip().rstrip(','))
+        self.assertEqual(
+            "one,sheep,slice,network,omf_friendly", output.lstrip().rstrip().rstrip(",")
+        )
 
     def test_pluralize(self):
-        proto = \
-"""
+        proto = """
   message TestPluralize {
       // The following field has an explicitly specified plural
       required int anecdote = 1 [plural = "data"];
@@ -110,18 +113,21 @@
 """
 
         target = XProtoTestHelpers.write_tmp_target(
-"""
+            """
 {% for m in proto.messages.0.fields -%}
 {{ xproto_pluralize(m) }},
 {%- endfor %}
-""")
+"""
+        )
         args = XOSProcessorArgs()
         args.inputs = proto
         args.target = target
         output = XOSProcessor.process(args)
-        self.assertEqual("data,sheep,slices,networks,omf_friendlies", output.lstrip().rstrip().rstrip(','))
+        self.assertEqual(
+            "data,sheep,slices,networks,omf_friendlies",
+            output.lstrip().rstrip().rstrip(","),
+        )
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     unittest.main()
-
-