<｜begin▁of▁sentence｜>### Instruction:
Given a requirement to initialize a new undirected graph with 5 nodes without any edges, can you use the '__new__' method of the GraphBase class to create such graph and print the number of vertices?
### Response:
from igraph import GraphBase

# Creating a new Graph object using the GraphBase.__new__ method
g = GraphBase.__new__(GraphBase)

# Initialize the Graph, which is required after using __new__
g.__init__(n=5, directed=False)
print(g.vcount())  # This should print the number of vertices, which is 5
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