add isort and fix import loops, preparing to shorten tests

textattack/search_methods/genetic_algorithm.py

@@ -5,9 +5,10 @@ by Alzantot et. al
 `<github.com/nesl/nlp_adversarial_examples>`_
 """
 
+from copy import deepcopy
+
 import numpy as np
 import torch
-from copy import deepcopy
 
 from textattack.search_methods import SearchMethod
 from textattack.shared.validators import transformation_consists_of_word_swaps