<｜begin▁of▁sentence｜>### Instruction:
As a financial advisor, you may need to store important financial network data in an optimized manner. Imagine you have a prominent network named 'Zachary's Karate Club'. To achieve efficient storage, you would need to write this network to a zipped GraphML file using the write_graphmlz function with a compression level of 6. The resulting file should be named 'zachary_graph.graphmlz'. This will ensure that the network data is both preserved and optimized for future use.
### Response:
from igraph import Graph

# Let's assume we have already created a graph called 'my_graph'
my_graph = Graph.Famous('Zachary')

# Now we write the graph to a zipped GraphML file with a desired compression level
filename = 'zachary_graph.graphmlz'
my_graph.write_graphmlz(f=filename, compresslevel=6)
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