def test_isomorphisms_on_directed_random_graph(self, host, motif):
assert find_motifs(motif,
host,
directed=True,
isomorphisms_only=True,
count_only=True) == len([
i for i in DiGraphMatcher(
host, motif).subgraph_isomorphisms_iter()
])
def test_subgraph_isomorphism_directed(self, backend):
G = Graph(backend=backend(directed=True))
nxG = nx.DiGraph()
G.nx.add_edge("A", "B")
nxG.add_edge("A", "B")
G.nx.add_edge("B", "C")
nxG.add_edge("B", "C")
G.nx.add_edge("C", "A")
nxG.add_edge("C", "A")
from networkx.algorithms.isomorphism import DiGraphMatcher
assert len([
i
for i in DiGraphMatcher(G.nx, G.nx).subgraph_monomorphisms_iter()
]) == len([
i for i in DiGraphMatcher(nxG, nxG).subgraph_monomorphisms_iter()
])
def mapping(self, other):
if not isinstance(other, GraphPattern):
return None
my_wire = self.wire
others_wire = other.wire
def __node_match(n1, n2):
return n1 == n2
def __edge_match(e1, e2):
return e1 == e2
matcher = DiGraphMatcher(my_wire, others_wire, node_match=__node_match, edge_match=__edge_match)
mapping = list(matcher.isomorphisms_iter())
if len(mapping) == 1:
return mapping.pop()
else:
return None
def check_isomorphism(Arg_list):
# Find unique argument structures
# checking graphs for isomorphism
# TODO: check for isomorphism taking into account edges (rel, sem_rel)
unclassified_graphs = Arg_list
graph_families = []
for unclassified_graph in unclassified_graphs:
for graph_family in graph_families:
family_member = graph_family[0]
dm = DiGraphMatcher(unclassified_graph, family_member)
if dm.is_isomorphic():
graph_family.append(unclassified_graph)
break
else:
graph_families.append([unclassified_graph])
return graph_families
def group_into_isomorphic_families(argument_graphs):
'''
Find unique argument structures and group them
into families
TODO: check for isomorphism taking into account edges (rel, sem_rel)
'''
unclassified_graphs = argument_graphs
graph_families = []
for unclassified_graph in unclassified_graphs:
for graph_family in graph_families:
family_member = graph_family[0]
dm = DiGraphMatcher(unclassified_graph, family_member)
if dm.is_isomorphic():
graph_family.append(unclassified_graph)
break
else:
graph_families.append([unclassified_graph])
return graph_families
def test_two_hop_count_matches_nx(self):
host = nx.fast_gnp_random_graph(10, 0.5, directed=True)
motif = nx.DiGraph()
motif.add_edge("A", "B")
motif.add_edge("B", "C")
assert len(find_motifs(motif, host)) == len([
i
for i in DiGraphMatcher(host, motif).subgraph_monomorphisms_iter()
])
def mapping(self, other):
# type: (AGP) -> dict
"""
:return: If there is any, the mapping with another graph pattern
"""
if not isinstance(other, AGP):
return {}
my_wire = self.wire
others_wire = other.wire
def __node_match(n1, n2):
return n1 == n2
def __edge_match(e1, e2):
return e1 == e2
matcher = DiGraphMatcher(my_wire, others_wire, node_match=__node_match, edge_match=__edge_match)
mapping = list(matcher.isomorphisms_iter())
if len(mapping) > 0:
return mapping.pop()
else:
return dict()
def match(self, pattern):
"""
:param subgraph:
:return:
"""
def node_match(node, pattern_node):
"""
:param node:
:param pattern_node:
:return:
"""
node = node["Node"]
pattern_node = pattern_node["Node"]
result = True
fields = [
'FORM', 'LEMMA', 'UPOS', 'XPOS', 'HEAD', 'DEPREL', 'DEPS',
'MISC'
]
for field in fields:
if getattr(pattern_node, field) is not None:
if getattr(node, field) is None:
result = False
else:
pattern_field_value = getattr(pattern_node, field)
instance_field_value = getattr(node, field)
if not any(
re.match(pattern_field_value, x)
for x in instance_field_value.split("|")):
result = False
if pattern_node.FEATS:
for key, value in pattern_node.FEATS.items():
if key not in node.FEATS or value not in node.FEATS[key]:
result = False
# print("Node Matched")
# print("In node match", node.ID, pattern_node.ID, result)
return result
def edge_match(edges, pattern_edges):
"""
:param edge:
:param pattern_edge:
:return:
"""
edges = edges["Edge"].rels
pattern_edges = pattern_edges["Edge"].rels
result = False
for edge, pattern_edge in itertools.product(edges, pattern_edges):
match = re.match(pattern_edge, edge)
if match:
result = True
return result
match_iter = DiGraphMatcher(
self.g, pattern.g, node_match=node_match,
edge_match=edge_match).subgraph_isomorphisms_iter()
for result in match_iter:
result = dict((pattern.get_node(v), self.get_node(k))
for k, v in result.items())
yield result