78 lines
2.0 KiB
Python
78 lines
2.0 KiB
Python
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#!/usr/bin/python3
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"""
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SPDX-FileCopyrightText: 2023 Ämin Baumeler <amin@indyfac.ch> and Eleftherios-Ermis Tselentis <eleftheriosermis.tselentis@oeaw.ac.at>
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SPDX-License-Identifier: GPL-3.0-or-later
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"""
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import sys
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import getopt
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import numpy as np
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import networkx as nx
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"""Parse command line arguments first."""
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helpstr = """Usage: """+sys.argv[0]+""" -f <filename>
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Filters out the isomorphic graphs in `filename'."""
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FILENAME = False
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try:
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opts, args = getopt.getopt(sys.argv[1:], "hf:")
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except getopt.GetoptError:
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print(helpstr, file=sys.stderr)
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sys.exit(2)
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for opt, arg in opts:
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if opt == '-h':
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print(helpstr)
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sys.exit()
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elif opt == '-f':
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FILENAME = arg
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if not FILENAME:
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print(helpstr, file=sys.stderr)
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sys.exit(2)
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with open(FILENAME, 'rb') as f:
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num_lines = sum(1 for _ in f)
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print(f"Total number of digraphs is {num_lines}", file=sys.stderr)
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nonisodigraphs = set()
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cnt = 0
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fnd = 0
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with open(FILENAME, 'r') as f:
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while 1:
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cnt = cnt + 1
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print("\r{:.2f}%".format(100*cnt/num_lines), end='', file=sys.stderr)
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line = f.readline().strip('{}\n')
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if not line:
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break
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G = nx.from_numpy_matrix(np.vectorize(int)(np.matrix([x.split(',') for x in line.split('},{')])), create_using=nx.DiGraph)
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couldbeold = False
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for H in nonisodigraphs:
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# Returns False if graphs are definitely not isomorphic.
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# True does NOT guarantee isomorphism.
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if nx.faster_could_be_isomorphic(G, H):
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couldbeold = True
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break
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if not couldbeold:
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nonisodigraphs.add(G)
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fnd = fnd + 1
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print(f"{{{{{line}}}}}")
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continue
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new = True
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for H in nonisodigraphs:
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if nx.is_isomorphic(G, H):
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new = False
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break
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if new:
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nonisodigraphs.add(G)
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fnd = fnd + 1
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print(f"{{{{{line}}}}}")
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print(f"\r100% Found {fnd} non-isomoric graphs", file=sys.stderr)
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