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#!/usr/bin/env python
"""
Read and write graphs.
"""
__author__ = """Aric Hagberg (hagberg@lanl.gov)"""
# Copyright (C) 2004-2015 by
# Aric Hagberg <hagberg@lanl.gov>
# Dan Schult <dschult@colgate.edu>
# Pieter Swart <swart@lanl.gov>
# All rights reserved.
# BSD license.
from networkx import *
import sys
G=grid_2d_graph(5,5) # 5x5 grid
try: # Python 2.6+
write_adjlist(G,sys.stdout) # write adjacency list to screen
except TypeError: # Python 3.x
write_adjlist(G,sys.stdout.buffer) # write adjacency list to screen
# write edgelist to grid.edgelist
write_edgelist(G,path="grid.edgelist",delimiter=":")
# read edgelist from grid.edgelist
H=read_edgelist(path="grid.edgelist",delimiter=":")
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