Fixes black failures from Previous PR (#1751)

* Fixes black failures from Previous PR

* Fixes equality testing alert

* Fixes call to main() alert

* Fixes unused import

data_structures/binary_tree/binary_search_tree.py

@@ -56,13 +56,13 @@ class BinarySearchTree:
             parent_node = self.root  # from root
             while True:  # While we don't get to a leaf
                 if value < parent_node.value:  # We go left
-                    if parent_node.left == None:
+                    if parent_node.left is None:
                         parent_node.left = new_node  # We insert the new node in a leaf
                         break
                     else:
                         parent_node = parent_node.left
                 else:
-                    if parent_node.right == None:
+                    if parent_node.right is None:
                         parent_node.right = new_node
                         break
                     else:

dynamic_programming/optimal_binary_search_tree.py

@@ -24,6 +24,7 @@ from random import randint
 
 class Node:
     """Binary Search Tree Node"""
+
     def __init__(self, key, freq):
         self.key = key
         self.freq = freq

hashes/hamming_code.py

@@ -140,7 +140,7 @@ def emitterConverter(sizePar, data):
     # Mount the message
     ContBP = 0  # parity bit counter
     for x in range(0, sizePar + len(data)):
-        if dataOrd[x] == None:
+        if dataOrd[x] is None:
             dataOut.append(str(parity[ContBP]))
             ContBP += 1
         else:
@@ -243,7 +243,7 @@ def receptorConverter(sizePar, data):
     # Mount the message
     ContBP = 0  # Parity bit counter
     for x in range(0, sizePar + len(dataOutput)):
-        if dataOrd[x] == None:
+        if dataOrd[x] is None:
             dataOut.append(str(parity[ContBP]))
             ContBP += 1
         else:

maths/bisection.py

@@ -6,6 +6,8 @@ Find root of function in interval [a, b] (Or find a value of x such that f(x) is
 
 https://en.wikipedia.org/wiki/Bisection_method
 """
+
+
 def equation(x: float) -> float:
     """
     >>> equation(5)

searches/tabu_search.py

@@ -25,7 +25,6 @@ e.g. python tabu_search.py -f tabudata2.txt -i 4 -s 3
 
 import copy
 import argparse
-import sys
 
 
 def generate_neighbours(path):
@@ -278,4 +277,4 @@ if __name__ == "__main__":
     )
 
     # Pass the arguments to main method
-    sys.exit(main(parser.parse_args()))
+    main(parser.parse_args())

strings/aho-corasick.py

@@ -47,7 +47,7 @@ class Automaton:
                 q.append(child)
                 state = self.adlist[r]["fail_state"]
                 while (
-                    self.find_next_state(state, self.adlist[child]["value"]) == None
+                    self.find_next_state(state, self.adlist[child]["value"]) is None
                     and state != 0
                 ):
                     state = self.adlist[state]["fail_state"]