class_docstr: A directed graph where edges are one-way (a two-way edge can be represented by using two edges).
docstr: Create a new graph with vertex_count vertices.
docstr_tok: ["Create","a","new","graph","with","vertex_count","vertices","."]
code: def __init__(self, vertex_count):
      """
      Create a new graph with vertex_count vertices.
      """
  
      self.vertex_count = vertex_count
      self.graph = defaultdict(list)
  
file_path: keon-algos/algorithms/graph/check_digraph_strongly_connected.py
imports: from collections import defaultdict
label_desc: Use image node_id 1 to create a new Graph object  with example: obj = Graph(vertex_count)