various python neatness cleanups

All changes were created by running

"pyupgrade --py3-only --keep-percent-format"

and committing the results. I have not touched string formatting for
now.

- use set literals
- simplify .format() parameter naming
- remove __future__
- remove default "r" mode for open()
- use OSError rather than compatibility aliases
- remove stray parentheses in function(generator) scopes

1 files changed, 3 insertions, 3 deletions

diff --git a/mesonbuild/modules/python.py b/mesonbuild/modules/python.py
index cfe2244..d05c72a 100644
--- a/mesonbuild/modules/python.py
+++ b/mesonbuild/modules/python.py
@@ -36,9 +36,9 @@ from ..dependencies.base import (
     NonExistingExternalProgram, NotFoundDependency
 )
 
-mod_kwargs = set(['subdir'])
+mod_kwargs = {'subdir'}
 mod_kwargs.update(known_shmod_kwargs)
-mod_kwargs -= set(['name_prefix', 'name_suffix'])
+mod_kwargs -= {'name_prefix', 'name_suffix'}
 
 class PythonDependency(ExternalDependency):
 
@@ -544,7 +544,7 @@ class PythonModule(ExtensionModule):
             for mod in want_modules:
                 p, out, err = mesonlib.Popen_safe(
                     python.command +
-                    ['-c', 'import {0}'.format(mod)])
+                    ['-c', 'import {}'.format(mod)])
                 if p.returncode != 0:
                     missing_modules.append(mod)
                 else: