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def GraphObjectContainer_byindex(self, idx):

for e in self:

if e.index() == idx:

return e

raise IndexError("Container has no element with index %s." % idx)

def advance_iterator(self):

if not self.valid():

raise StopIteration()

val = self.__deref__()

self.__preinc__()

return val

def cpp_iterator(self):

it = self.begin()

while it != self.end():

yield it.__deref__()

it.__preinc__()

def iterable_getitem(self, key):

if isinstance(key, slice):

indices = range(*key.indices(len(self)))

elems = []

try:

next_ind = next(indices)

for i, e in enumerate(self):

if i == next_ind:

elems.append(e)

next_ind = next(indices)

except StopIteration:

pass

return elems

elif isinstance(key, int):

if key < 0:

key += len(self)

if key < 0 or key >= len(self):

raise IndexError("The index (%d) is out of range." % key)

for i, e in enumerate(self):

if i == key:

return e

else:

raise TypeError("Invalid argument type %s." % type(key))

def get_adjentry_array_keys(aea):

for e in aea.graphOf().edges:

yield e.adjSource()

yield e.adjTarget()

ArrayKeys = {

"Node": lambda na: na.graphOf().nodes,

"Edge": lambda ea: ea.graphOf().edges,

"AdjEntry": get_adjentry_array_keys,

"Cluster": lambda ca: ca.graphOf().clusters,

"Face": lambda fa: fa.embeddingOf().faces,

}