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/linkers.py b/mesonbuild/linkers.py
index d8d2e65..f4c6dca 100644
--- a/mesonbuild/linkers.py
+++ b/mesonbuild/linkers.py
@@ -838,7 +838,7 @@ class CcrxDynamicLinker(DynamicLinker):
         return ['-output={}'.format(outputname)]
 
     def get_search_args(self, dirname: str) -> 'T.NoReturn':
-        raise EnvironmentError('rlink.exe does not have a search dir argument')
+        raise OSError('rlink.exe does not have a search dir argument')
 
     def get_allow_undefined_args(self) -> T.List[str]:
         return []
@@ -878,7 +878,7 @@ class Xc16DynamicLinker(DynamicLinker):
         return ['-o{}'.format(outputname)]
 
     def get_search_args(self, dirname: str) -> 'T.NoReturn':
-        raise EnvironmentError('xc16-gcc.exe does not have a search dir argument')
+        raise OSError('xc16-gcc.exe does not have a search dir argument')
 
     def get_allow_undefined_args(self) -> T.List[str]:
         return []
@@ -966,7 +966,7 @@ class C2000DynamicLinker(DynamicLinker):
         return ['-z', '--output_file={}'.format(outputname)]
 
     def get_search_args(self, dirname: str) -> 'T.NoReturn':
-        raise EnvironmentError('cl2000.exe does not have a search dir argument')
+        raise OSError('cl2000.exe does not have a search dir argument')
 
     def get_allow_undefined_args(self) -> T.List[str]:
         return []