def iter_parents(p):
if not p.difficult_parent_child:
for pp in p.known_parents:
yield pp
return
for e in p.edges:
o = e.other(p)
if e.definitive_child and child_parent_direction(o, p):
yield o
def iter_parents(p):
if not p.difficult_parent_child:
for pp in p.known_parents:
yield pp
return
for e in p.edges:
o = e.other(p)
if e.definitive_child and child_parent_direction(o, p):
yield o
def iter_children(p):
if not p.difficult_parent_child:
for c in p.children:
yield c
return
for e in p.edges:
o = e.other(p)
if e.definitive_child and child_parent_direction(p, o):
yield o
def iter_children(p):
if not p.difficult_parent_child:
for c in p.children:
yield c
return
for e in p.edges:
o = e.other(p)
if e.definitive_child and child_parent_direction(p, o):
yield o
