def get_node(self, key):
"""
Override parent's get_node function. (Supported to search by
cluster name , key and instance)
@param data The key
@type data db.Key
@type data int
@type data basestring The key of cluster
"""
if isinstance(key, int):
id = key
else:
if isinstance(key, basestring):
# The name of the cluster
if isinstance(key, unicode):
cluster = str(key)
else:
cluster = key
elif isinstance(key, db.Key):
cluster = key().id_or_name()
else:
cluster = key.key().id_or_name()
id = self.cluster_id[cluster]
return Graph.get_node(self, id)
