Fix tox

Author: MightyHelper

src/interactive_sort/main.py

@@ -3,6 +3,7 @@
 import bisect
 import os
 import re
+import sys
 from functools import cmp_to_key
 
 
@@ -155,10 +156,10 @@ def key_func(x):
     def display_sorted(self):
         """Displays the current sorted data."""
         output_stream = sys.stderr if self.args.stderr else sys.stdout
-        
+
         if not self.args.stderr:
-            os.system('cls' if os.name == 'nt' else 'clear')
-        
+            os.system("cls" if os.name == "nt" else "clear")
+
         print("--- Interactive Sorted Data ---", file=output_stream)
         items_to_display = self.data
         if self.args.unique:
@@ -176,7 +177,9 @@ def output_final_sorted(self):
         """Outputs the final sorted data to stdout (used when stderr flag is set)."""
         items_to_display = self.data
         if self.args.unique:
-            items_to_display = sorted(list(set(items_to_display)), key=lambda x: self.data.index(x)) # Maintain original order of first occurrence
+            items_to_display = sorted(
+                set(items_to_display), key=lambda x: self.data.index(x)
+            )  # Maintain original order of first occurrence
         if self.args.reverse:
             items_to_display = reversed(items_to_display)