Merge branch 'test-cases-for-graphs/directed_and_undirected_weighted_graph.py' of https://github.com/yashwanth-adimulam/Python into test-cases-for-graphs/directed_and_undirected_weighted_graph.py

Author: yashwanth-adimulam

graphs/directed_and_undirected_weighted_graph.py

@@ -10,12 +10,12 @@
               https://en.wikipedia.org/wiki/Graph_(discrete_mathematics)
 """
 
-
 from collections import deque
 from math import floor
 from random import random
 from time import time
 
+
 class DirectedGraph:
     def __init__(self):
         self.graph = {}