<｜begin▁of▁sentence｜>### Instruction:
Class, imagine we're on a field trip to the local Science Museum, where we find an interactive exhibit that demonstrates various concepts of network theory in ecology. Picture a simple ecosystem shown on a digital screen, consisting of different species represented by the nodes 'A,' 'B,' 'C,' 'D,' and 'E,' with connections between them signifying predation or symbiotic relationships. These connections are displayed as pairs: ('A', 'B'), ('B', 'C'), ('C', 'D'), and ('D', 'E').

Now, to deepen our understanding of this ecological network, the exhibit allows us to calculate the importance of each species within the ecosystem using a concept called harmonic centrality. It's a measure similar to how we may identify keystone species in a habitat based on their roles within their food webs.

Your challenge is to use the interactive touchscreen to determine the harmonic centrality of each node - that is, each species - in this simplistic food web. Discuss with your peers, what might be the impact on the ecosystem if the species with the highest harmonic centrality were to disappear?
### Response:
import networkx as nx

# Create a graph
G = nx.Graph()
G.add_edges_from([('A', 'B'), ('B', 'C'), ('C', 'D'), ('D', 'E')])

# Compute the harmonic centrality of the nodes
h_centrality = nx.harmonic_centrality(G)

# Print the harmonic centrality of each node
for node in h_centrality:
    print(f'Harmonic Centrality of {node}: {h_centrality[node]}')
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