<｜begin▁of▁sentence｜>### Instruction:
As a telecommunications engineer, you have been tasked with analyzing a network graph stored in a GraphDB format file named 'graph.db' to calculate its diameter, considering that the graph is directed. The information about the graph is crucial for optimizing the data transmission and ensuring effective network operations. However, it is important to note the structure and requirements of the graph in order to accurately determine its diameter. To achieve this, utilizing the Read_GraphDB function in igraph can provide valuable insights into the network's connectivity and maximum distance between nodes.
### Response:
import igraph as ig

# Assuming 'graph.db' is the name of the GraphDB format file
g = ig.Graph.Read_GraphDB('graph.db', directed=True)

# Now 'g' contains the graph read from the 'graph.db' file

# Let's perform a basic analysis, for example, calculating the diameter of the graph
diameter = g.diameter(directed=True)
print('Diameter of the graph:', diameter)
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