80 lines
2.0 KiB
Python
80 lines
2.0 KiB
Python
# Copyright (C) 2004-2019 by
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# Aric Hagberg <hagberg@lanl.gov>
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# Dan Schult <dschult@colgate.edu>
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# Pieter Swart <swart@lanl.gov>
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# All rights reserved.
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# BSD license.
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#
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# Author: Aric Hagberg (hagberg@lanl.gov),
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# Pieter Swart (swart@lanl.gov),
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# Dan Schult(dschult@colgate.edu)
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"""Filter factories to hide or show sets of nodes and edges.
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These filters return the function used when creating `SubGraph`.
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"""
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__all__ = ['no_filter', 'hide_nodes',
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'hide_edges', 'hide_multiedges',
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'hide_diedges', 'hide_multidiedges',
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'show_nodes',
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'show_edges', 'show_multiedges',
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'show_diedges', 'show_multidiedges',
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]
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def no_filter(*items):
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return True
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def hide_nodes(nodes):
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nodes = set(nodes)
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return lambda node: node not in nodes
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def hide_diedges(edges):
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edges = {(u, v) for u, v in edges}
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return lambda u, v: (u, v) not in edges
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def hide_edges(edges):
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alledges = set(edges) | {(v, u) for (u, v) in edges}
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return lambda u, v: (u, v) not in alledges
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def hide_multidiedges(edges):
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edges = {(u, v, k) for u, v, k in edges}
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return lambda u, v, k: (u, v, k) not in edges
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def hide_multiedges(edges):
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alledges = set(edges) | {(v, u, k) for (u, v, k) in edges}
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return lambda u, v, k: (u, v, k) not in alledges
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# write show_nodes as a class to make SubGraph pickleable
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class show_nodes(object):
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def __init__(self, nodes):
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self.nodes = set(nodes)
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def __call__(self, node):
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return node in self.nodes
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def show_diedges(edges):
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edges = {(u, v) for u, v in edges}
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return lambda u, v: (u, v) in edges
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def show_edges(edges):
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alledges = set(edges) | {(v, u) for (u, v) in edges}
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return lambda u, v: (u, v) in alledges
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def show_multidiedges(edges):
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edges = {(u, v, k) for u, v, k in edges}
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return lambda u, v, k: (u, v, k) in edges
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def show_multiedges(edges):
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alledges = set(edges) | {(v, u, k) for (u, v, k) in edges}
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return lambda u, v, k: (u, v, k) in alledges
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