Enable ruff UP ruleset for pyupgrade

Author: tleonhardt

cmd2/argparse_custom.py

@@ -283,7 +283,7 @@ class CompletionItem(str):  # noqa: SLOT000
     """
 
     def __new__(cls, value: object, *args: Any, **kwargs: Any) -> 'CompletionItem':
-        return super(CompletionItem, cls).__new__(cls, value)
+        return super().__new__(cls, value)
 
     def __init__(self, value: object, description: str = '', *args: Any) -> None:
         """
@@ -1252,7 +1252,7 @@ def __init__(
         """
         if sys.version_info >= (3, 14):
             # Python >= 3.14 so pass new arguments to parent argparse.ArgumentParser class
-            super(Cmd2ArgumentParser, self).__init__(
+            super().__init__(
                 prog=prog,
                 usage=usage,
                 description=description,
@@ -1271,7 +1271,7 @@ def __init__(
             )
         else:
             # Python < 3.14, so don't pass new arguments to parent argparse.ArgumentParser class
-            super(Cmd2ArgumentParser, self).__init__(
+            super().__init__(
                 prog=prog,
                 usage=usage,
                 description=description,

cmd2/cmd2.py

@@ -4089,7 +4089,7 @@ def select(self, opts: Union[str, list[str], list[tuple[Any, Optional[str]]]], p
                 except IndexError:
                     fulloptions.append((opt[0], opt[0]))
         for idx, (_, text) in enumerate(fulloptions):
-            self.poutput('  %2d. %s' % (idx + 1, text))
+            self.poutput('  %2d. %s' % (idx + 1, text))  # noqa: UP031
 
         while True:
             try:

plugins/ext_test/cmd2_ext_test/__init__.py

@@ -1,5 +1,3 @@
-#
-# coding=utf-8
 """cmd2 External Python Testing Mixin
 
 Allows developers to exercise their cmd2 application using the PyScript interface

plugins/ext_test/cmd2_ext_test/cmd2_ext_test.py

@@ -1,5 +1,3 @@
-#
-# coding=utf-8
 """External test interface plugin"""
 
 from typing import (

plugins/ext_test/examples/example.py

@@ -1,6 +1,3 @@
-#
-# coding=utf-8
-# import cmd2
 import cmd2_ext_test
 
 import cmd2

plugins/ext_test/setup.py

@@ -1,6 +1,3 @@
-#
-# coding=utf-8
-
 import os
 
 import setuptools

plugins/ext_test/tasks.py

@@ -24,7 +24,7 @@ def rmrf(items, verbose=True):
 
     for item in items:
         if verbose:
-            print("Removing {}".format(item))
+            print(f"Removing {item}")
         shutil.rmtree(item, ignore_errors=True)
         # rmtree doesn't remove bare files
         try:

plugins/ext_test/tests/test_ext_test.py

@@ -1,6 +1,3 @@
-#
-# coding=utf-8
-
 import cmd2_ext_test
 import pytest
 

pyproject.toml

@@ -216,7 +216,7 @@ select = [
     "TD",  # flake8-todos (force all TODOs to include an author and issue link)
     "TID", # flake8-tidy-imports (extra import rules to check)
     # "TRY",  # tryceratops (warnings related to exceptions and try/except)
-    # "UP",  # pyupgrade (A tool (and pre-commit hook) to automatically upgrade syntax for newer versions of the language)
+    "UP",  # pyupgrade (A tool (and pre-commit hook) to automatically upgrade syntax for newer versions of the language)
     "W",   # pycodestyle warnings (warn about minor stylistic issues)
     "YTT", # flake8-2020 (checks for misuse of sys.version or sys.version_info)
 ]
@@ -237,6 +237,8 @@ ignore = [
     "TC006",  # Add quotes to type expression in typing.cast() (not needed except for forward references)
     "UP007",  # Use X | Y for type annotations (requires Python 3.10+)
     "UP017",  # Use datetime.UTC alias (requires Python 3.11+)
+    "UP036",  # Version block is outdated for minimum Python version (requires ruff target_version set to minimum supported)
+    "UP038",  # Use X | Y in {} call instead of (X, Y) - deprecated due to poor performance (requires Python 3.10+)
     "W191",   # Conflicts with ruff format
 ]
 
@@ -254,6 +256,10 @@ per-file-ignores."cmd2/__init__.py" = [
     "F401", # Unused import
 ]
 
+per-file-ignores."cmd2/argparse_custom.py" = [
+    "UP031", # Use format specifiers instead of percent format (auto fix is unsafe)
+]
+
 per-file-ignores."examples/*.py" = [
     "INP001",  # Module is part of an implicit namespace
     "PLW2901", # loop variable overwritten inside loop