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, 7 insertions, 9 deletions

diff --git a/examples/hooks.py b/examples/hooks.py
index f8079e58..55b43e5d 100755
--- a/examples/hooks.py
+++ b/examples/hooks.py
@@ -60,20 +60,17 @@ class CmdLineApp(cmd2.Cmd):
         command_pattern = re.compile(r'^([^\s\d]+)(\d+)')
         match = command_pattern.search(command)
         if match:
-            data.statement = self.statement_parser.parse("{} {} {}".format(
-                match.group(1),
-                match.group(2),
-                '' if data.statement.args is None else data.statement.args
-            ))
+            data.statement = self.statement_parser.parse(
+                "{} {} {}".format(match.group(1), match.group(2), '' if data.statement.args is None else data.statement.args)
+            )
         return data
 
     def downcase_hook(self, data: cmd2.plugin.PostparsingData) -> cmd2.plugin.PostparsingData:
         """A hook to make uppercase commands lowercase."""
         command = data.statement.command.lower()
-        data.statement = self.statement_parser.parse("{} {}".format(
-            command,
-            '' if data.statement.args is None else data.statement.args
-        ))
+        data.statement = self.statement_parser.parse(
+            "{} {}".format(command, '' if data.statement.args is None else data.statement.args)
+        )
         return data
 
     def abbrev_hook(self, data: cmd2.plugin.PostparsingData) -> cmd2.plugin.PostparsingData:
@@ -106,5 +103,6 @@ class CmdLineApp(cmd2.Cmd):
 
 if __name__ == '__main__':
     import sys
+
     c = CmdLineApp()
     sys.exit(c.cmdloop())