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"""
======================
Read and write graphs.
======================
Read and write graphs.
"""
import matplotlib.pyplot as plt
import networkx as nx
G = nx.grid_2d_graph(5, 5) # 5x5 grid
# print the adjacency list
for line in nx.generate_adjlist(G):
print(line)
# write edgelist to grid.edgelist
nx.write_edgelist(G, path="grid.edgelist", delimiter=":")
# read edgelist from grid.edgelist
H = nx.read_edgelist(path="grid.edgelist", delimiter=":")
pos = nx.spring_layout(H, seed=200)
nx.draw(H, pos)
plt.show()
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