Adds pre-commit config to run various lintersci_improvements

This ads black, isort, pyupgrade, and flake8 to pre-commit-config.yaml
There are also some small changes to travis.yml and tasks.py to reduce
some repeated configurations that should be consolidated into
setup.cfg. Most other changes are automated by the linter scripts.

1 files changed, 8 insertions, 11 deletions

diff --git a/examples/cmd_as_argument.py b/examples/cmd_as_argument.py
index b65bcbcb..73f0dc22 100755
--- a/examples/cmd_as_argument.py
+++ b/examples/cmd_as_argument.py
@@ -50,7 +50,7 @@ class CmdLineApp(cmd2.Cmd):
         words = []
         for word in args.words:
             if args.piglatin:
-                word = '%s%say' % (word[1:], word[0])
+                word = '{}{}ay'.format(word[1:], word[0])
             if args.shout:
                 word = word.upper()
             words.append(word)
@@ -72,13 +72,13 @@ class CmdLineApp(cmd2.Cmd):
         repetitions = args.repeat or 1
         for i in range(min(repetitions, self.maxrepeats)):
             output = []
-            if random.random() < .33:
+            if random.random() < 0.33:
                 output.append(random.choice(self.MUMBLE_FIRST))
             for word in args.words:
-                if random.random() < .40:
+                if random.random() < 0.40:
                     output.append(random.choice(self.MUMBLES))
                 output.append(word)
-            if random.random() < .25:
+            if random.random() < 0.25:
                 output.append(random.choice(self.MUMBLE_LAST))
             self.poutput(' '.join(output))
 
@@ -86,15 +86,11 @@ class CmdLineApp(cmd2.Cmd):
 def main(argv=None):
     """Run when invoked from the operating system shell"""
 
-    parser = argparse.ArgumentParser(
-        description='Commands as arguments'
-    )
+    parser = argparse.ArgumentParser(description='Commands as arguments')
     command_help = 'optional command to run, if no command given, enter an interactive shell'
-    parser.add_argument('command', nargs='?',
-                        help=command_help)
+    parser.add_argument('command', nargs='?', help=command_help)
     arg_help = 'optional arguments for command'
-    parser.add_argument('command_args', nargs=argparse.REMAINDER,
-                        help=arg_help)
+    parser.add_argument('command_args', nargs=argparse.REMAINDER, help=arg_help)
 
     args = parser.parse_args(argv)
 
@@ -113,4 +109,5 @@ def main(argv=None):
 
 if __name__ == '__main__':
     import sys
+
     sys.exit(main())