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, 14 insertions, 10 deletions

diff --git a/cmd2/transcript.py b/cmd2/transcript.py
index 940c97db..563756ed 100644
--- a/cmd2/transcript.py
+++ b/cmd2/transcript.py
@@ -25,6 +25,7 @@ class Cmd2TestCase(unittest.TestCase):
 
     See example.py
     """
+
     cmdapp = None
 
     def setUp(self):
@@ -67,7 +68,7 @@ class Cmd2TestCase(unittest.TestCase):
                     finished = True
                     break
                 line_num += 1
-            command = [line[len(self.cmdapp.visible_prompt):]]
+            command = [line[len(self.cmdapp.visible_prompt) :]]
             try:
                 line = next(transcript)
             except StopIteration:
@@ -75,12 +76,13 @@ class Cmd2TestCase(unittest.TestCase):
             line_num += 1
             # Read the entirety of a multi-line command
             while line.startswith(self.cmdapp.continuation_prompt):
-                command.append(line[len(self.cmdapp.continuation_prompt):])
+                command.append(line[len(self.cmdapp.continuation_prompt) :])
                 try:
                     line = next(transcript)
                 except StopIteration as exc:
-                    msg = 'Transcript broke off while reading command beginning at line {} with\n{}'.format(line_num,
-                                                                                                            command[0])
+                    msg = 'Transcript broke off while reading command beginning at line {} with\n{}'.format(
+                        line_num, command[0]
+                    )
                     raise StopIteration(msg) from exc
                 line_num += 1
             command = ''.join(command)
@@ -91,7 +93,8 @@ class Cmd2TestCase(unittest.TestCase):
             # Read the expected result from transcript
             if ansi.strip_style(line).startswith(self.cmdapp.visible_prompt):
                 message = '\nFile {}, line {}\nCommand was:\n{}\nExpected: (nothing)\nGot:\n{}\n'.format(
-                          fname, line_num, command, result)
+                    fname, line_num, command, result
+                )
                 self.assertTrue(not (result.strip()), message)
                 # If the command signaled the application to quit there should be no more commands
                 self.assertFalse(stop, stop_msg)
@@ -114,7 +117,8 @@ class Cmd2TestCase(unittest.TestCase):
             expected = ''.join(expected)
             expected = self._transform_transcript_expected(expected)
             message = '\nFile {}, line {}\nCommand was:\n{}\nExpected:\n{}\nGot:\n{}\n'.format(
-                      fname, line_num, command, expected, result)
+                fname, line_num, command, expected, result
+            )
             self.assertTrue(re.match(expected, result, re.MULTILINE | re.DOTALL), message)
 
     def _transform_transcript_expected(self, s: str) -> str:
@@ -160,7 +164,7 @@ class Cmd2TestCase(unittest.TestCase):
                 else:
                     # No closing slash, we have to add the first slash,
                     # and the rest of the text
-                    regex += re.escape(s[start - 1:])
+                    regex += re.escape(s[start - 1 :])
                     break
         return regex
 
@@ -187,18 +191,18 @@ class Cmd2TestCase(unittest.TestCase):
                 break
             else:
                 # check if the slash is preceeded by a backslash
-                if s[pos - 1:pos] == '\\':
+                if s[pos - 1 : pos] == '\\':
                     # it is.
                     if in_regex:
                         # add everything up to the backslash as a
                         # regular expression
-                        regex += s[start:pos - 1]
+                        regex += s[start : pos - 1]
                         # skip the backslash, and add the slash
                         regex += s[pos]
                     else:
                         # add everything up to the backslash as escaped
                         # plain text
-                        regex += re.escape(s[start:pos - 1])
+                        regex += re.escape(s[start : pos - 1])
                         # and then add the slash as escaped
                         # plain text
                         regex += re.escape(s[pos])