def average_degree(self, *largs, **kargs):
store = lookup(kargs, "store", default = discretezoo.WRITE_TO_DB,
destroy = True)
cur = lookup(kargs, "cur", default = None, destroy = True)
default = len(largs) + len(kargs) == 0
try:
if not default:
raise NotImplementedError
lookup(self._graphprops, "average_degree")
return 2*self.size(store = store,
cur = cur)/self.order(store = store, cur = cur)
except (KeyError, NotImplementedError):
a = Graph.average_degree(self, *largs, **kargs)
if default:
if store:
self._update_rows(ZooGraph, {"average_degree": a},
{self._spec["primary_key"]: self._zooid},
cur = cur)
update(self._graphprops, "average_degree", a)
return a
def _average_degree(self, val, store, cur):
r"""
Replacement function providing the average degree as a rational number.
"""
with DBParams(locals(), store, cur):
return Graph.average_degree(self)
