<｜begin▁of▁sentence｜>### Instruction:
As a robotics engineer, you have been tasked with optimizing the cohesive block structure of a network that controls a fleet of robotic devices in a manufacturing facility. Using the GraphML format, you will need to calculate the cohesive block structure of the network graph to determine the cohesion levels and parent information for each block, ultimately improving the efficiency and coordination of the robotic fleet within the facility.
### Response:
from igraph import Graph

# Load a graph from a file
graph = Graph.Read_GML('graph.gml')

# Calculate the cohesive block structure of the graph
cblocks = graph.cohesive_blocks()

# Access the blocks, cohesion levels, and parent structure
cblocks_cohesion = cblocks.cohesion
blocks = cblocks.blocks
parents = cblocks.parent

# Print cohesive blocks information
for level, block in enumerate(blocks):
    print(f'Block at level {level}, Cohesion: {cblocks_cohesion[level]}, Block: {block}')
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