fix black at prefix string (#6122)

* fix black at prefix string

* Type -> type

* Type unused

Author: poyea

conversions/prefix_conversions_string.py

@@ -11,7 +11,7 @@
 from __future__ import annotations
 
 from enum import Enum, unique
-from typing import Type, TypeVar
+from typing import TypeVar
 
 # Create a generic variable that can be 'Enum', or any subclass.
 T = TypeVar("T", bound="Enum")
@@ -53,7 +53,7 @@ class SIUnit(Enum):
     yocto = -24
 
     @classmethod
-    def get_positive(cls: Type[T]) -> dict:
+    def get_positive(cls: type[T]) -> dict:
         """
         Returns a dictionary with only the elements of this enum
         that has a positive value
@@ -68,7 +68,7 @@ def get_positive(cls: Type[T]) -> dict:
         return {unit.name: unit.value for unit in cls if unit.value > 0}
 
     @classmethod
-    def get_negative(cls: Type[T]) -> dict:
+    def get_negative(cls: type[T]) -> dict:
         """
         Returns a dictionary with only the elements of this enum
         that has a negative value
@@ -94,7 +94,7 @@ def add_si_prefix(value: float) -> str:
     """
     prefixes = SIUnit.get_positive() if value > 0 else SIUnit.get_negative()
     for name_prefix, value_prefix in prefixes.items():
-        numerical_part = value / (10 ** value_prefix)
+        numerical_part = value / (10**value_prefix)
         if numerical_part > 1:
             return f"{str(numerical_part)} {name_prefix}"
     return str(value)
@@ -109,7 +109,7 @@ def add_binary_prefix(value: float) -> str:
     '64.0 kilo'
     """
     for prefix in BinaryUnit:
-        numerical_part = value / (2 ** prefix.value)
+        numerical_part = value / (2**prefix.value)
         if numerical_part > 1:
             return f"{str(numerical_part)} {prefix.name}"
     return str(value)