Run pyupgrade --py39-plus in all files except _vendor

1 files changed, 2 insertions, 2 deletions

diff --git a/pint/converters.py b/pint/converters.py
index 12248a8..9b8513f 100644
--- a/pint/converters.py
+++ b/pint/converters.py
@@ -44,7 +44,7 @@ class Converter:
 
     @classmethod
     def get_field_names(cls, new_cls):
-        return frozenset((p.name for p in dc_fields(new_cls)))
+        return frozenset(p.name for p in dc_fields(new_cls))
 
     @classmethod
     def preprocess_kwargs(cls, **kwargs):
@@ -57,7 +57,7 @@ class Converter:
             new_cls = cls._param_names_to_subclass[kwk]
         except KeyError:
             for new_cls in cls._subclasses:
-                p_names = frozenset((p.name for p in dc_fields(new_cls)))
+                p_names = frozenset(p.name for p in dc_fields(new_cls))
                 if p_names == kwk:
                     cls._param_names_to_subclass[kwk] = new_cls
                     break