# -*- coding: utf-8 -*-
"""Functions for expanding the neighborhoods of nodes."""
from typing import Iterable
from ...filters.node_predicates import is_pathology
from ...pipeline import uni_in_place_transformation
from ...utils import update_metadata, update_node_helper
from ....dsl import BaseEntity
__all__ = [
'expand_node_predecessors',
'expand_node_successors',
'expand_node_neighborhood',
'expand_nodes_neighborhoods',
'expand_all_node_neighborhoods',
]
[docs]@uni_in_place_transformation
def expand_node_predecessors(universe, graph, node: BaseEntity) -> None:
"""Expand around the predecessors of the given node in the result graph.
:param pybel.BELGraph universe: The graph containing the stuff to add
:param pybel.BELGraph graph: The graph to add stuff to
:param node: A BEL node
"""
skip_successors = set()
for successor in universe.successors(node):
if successor in graph:
skip_successors.add(successor)
continue
graph.add_node_from_data(successor)
graph.add_edges_from(
(source, successor, key, data)
for source, successor, key, data in universe.out_edges(node, data=True, keys=True)
if successor not in skip_successors
)
update_node_helper(universe, graph)
update_metadata(universe, graph)
[docs]@uni_in_place_transformation
def expand_node_successors(universe, graph, node: BaseEntity) -> None:
"""Expand around the successors of the given node in the result graph.
:param pybel.BELGraph universe: The graph containing the stuff to add
:param pybel.BELGraph graph: The graph to add stuff to
:param node: A BEL node
"""
skip_predecessors = set()
for predecessor in universe.predecessors(node):
if predecessor in graph:
skip_predecessors.add(predecessor)
continue
graph.add_node_from_data(predecessor)
graph.add_edges_from(
(predecessor, target, key, data)
for predecessor, target, key, data in universe.in_edges(node, data=True, keys=True)
if predecessor not in skip_predecessors
)
update_node_helper(universe, graph)
update_metadata(universe, graph)
[docs]@uni_in_place_transformation
def expand_node_neighborhood(universe, graph, node: BaseEntity) -> None:
"""Expand around the neighborhoods of the given node in the result graph.
Note: expands complexes' members
:param pybel.BELGraph universe: The graph containing the stuff to add
:param pybel.BELGraph graph: The graph to add stuff to
:param node: A BEL node
"""
expand_node_predecessors(universe, graph, node)
expand_node_successors(universe, graph, node)
[docs]@uni_in_place_transformation
def expand_nodes_neighborhoods(universe, graph, nodes: Iterable[BaseEntity]) -> None:
"""Expand around the neighborhoods of the given node in the result graph.
:param pybel.BELGraph universe: The graph containing the stuff to add
:param pybel.BELGraph graph: The graph to add stuff to
:param nodes: Nodes from the query graph
"""
for node in nodes:
expand_node_neighborhood(universe, graph, node)
[docs]@uni_in_place_transformation
def expand_all_node_neighborhoods(universe, graph, filter_pathologies: bool = False) -> None:
"""Expand the neighborhoods of all nodes in the given graph.
:param pybel.BELGraph universe: The graph containing the stuff to add
:param pybel.BELGraph graph: The graph to add stuff to
:param filter_pathologies: Should expansion take place around pathologies?
"""
for node in list(graph):
if filter_pathologies and is_pathology(node):
continue
expand_node_neighborhood(universe, graph, node)