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, 25 insertions, 30 deletions

diff --git a/examples/basic_completion.py b/examples/basic_completion.py
index f33029c9..aab7d3d1 100755
--- a/examples/basic_completion.py
+++ b/examples/basic_completion.py
@@ -22,14 +22,13 @@ food_item_strs = ['Pizza', 'Ham', 'Ham Sandwich', 'Potato']
 sport_item_strs = ['Bat', 'Basket', 'Basketball', 'Football', 'Space Ball']
 
 # This data is used to demonstrate delimiter_complete
-file_strs = \
-    [
-        '/home/user/file.db',
-        '/home/user/file space.db',
-        '/home/user/another.db',
-        '/home/other user/maps.db',
-        '/home/other user/tests.db'
-    ]
+file_strs = [
+    '/home/user/file.db',
+    '/home/user/file space.db',
+    '/home/user/another.db',
+    '/home/other user/maps.db',
+    '/home/other user/tests.db',
+]
 
 
 class BasicCompletion(cmd2.Cmd):
@@ -46,20 +45,17 @@ class BasicCompletion(cmd2.Cmd):
 
     def complete_flag_based(self, text, line, begidx, endidx) -> List[str]:
         """Completion function for do_flag_based"""
-        flag_dict = \
-            {
-                # Tab complete food items after -f and --food flags in command line
-                '-f': food_item_strs,
-                '--food': food_item_strs,
-
-                # Tab complete sport items after -s and --sport flags in command line
-                '-s': sport_item_strs,
-                '--sport': sport_item_strs,
-
-                # Tab complete using path_complete function after -p and --path flags in command line
-                '-p': self.path_complete,
-                '--path': self.path_complete,
-            }
+        flag_dict = {
+            # Tab complete food items after -f and --food flags in command line
+            '-f': food_item_strs,
+            '--food': food_item_strs,
+            # Tab complete sport items after -s and --sport flags in command line
+            '-s': sport_item_strs,
+            '--sport': sport_item_strs,
+            # Tab complete using path_complete function after -p and --path flags in command line
+            '-p': self.path_complete,
+            '--path': self.path_complete,
+        }
 
         return self.flag_based_complete(text, line, begidx, endidx, flag_dict=flag_dict)
 
@@ -69,12 +65,11 @@ class BasicCompletion(cmd2.Cmd):
 
     def complete_index_based(self, text, line, begidx, endidx) -> List[str]:
         """Completion function for do_index_based"""
-        index_dict = \
-            {
-                1: food_item_strs,  # Tab complete food items at index 1 in command line
-                2: sport_item_strs,  # Tab complete sport items at index 2 in command line
-                3: self.path_complete,  # Tab complete using path_complete function at index 3 in command line
-            }
+        index_dict = {
+            1: food_item_strs,  # Tab complete food items at index 1 in command line
+            2: sport_item_strs,  # Tab complete sport items at index 2 in command line
+            3: self.path_complete,  # Tab complete using path_complete function at index 3 in command line
+        }
 
         return self.index_based_complete(text, line, begidx, endidx, index_dict=index_dict)
 
@@ -83,8 +78,7 @@ class BasicCompletion(cmd2.Cmd):
         self.poutput("Args: {}".format(statement.args))
 
     # Use a partialmethod to set arguments to delimiter_complete
-    complete_delimiter_complete = functools.partialmethod(cmd2.Cmd.delimiter_complete,
-                                                          match_against=file_strs, delimiter='/')
+    complete_delimiter_complete = functools.partialmethod(cmd2.Cmd.delimiter_complete, match_against=file_strs, delimiter='/')
 
     def do_raise_error(self, statement: cmd2.Statement):
         """Demonstrates effect of raising CompletionError"""
@@ -103,5 +97,6 @@ class BasicCompletion(cmd2.Cmd):
 
 if __name__ == '__main__':
     import sys
+
     app = BasicCompletion()
     sys.exit(app.cmdloop())