<｜begin▁of▁sentence｜>### Instruction:
As a Public Health Educator working at a community health organization, I have a compressed graph file named 'compressed_graph.picklez'. This file contains critical data related to the network of healthcare providers and community resources in our area. As part of our efforts to optimize healthcare access, I would like to determine the number of vertices in this graph. This information will help us understand the scale and complexity of the healthcare network within our community.
### Response:
import igraph as ig

# Read the graph from compressed Python pickled format
g = ig.Graph.Read_Picklez('compressed_graph.picklez')

# Perform a basic operation, like counting the number of vertices
vertex_count = g.vcount()

# Print the number of vertices
print('Number of vertices in the graph:', vertex_count)
<|EOT|>
