fnss.topologies.topology.fan_in_out_capacities¶
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fan_in_out_capacities
(topology)[source]¶ Calculate fan-in and fan-out capacities for all nodes of the topology.
The fan-in capacity of a node is the sum of capacities of all incoming links, while the fan-out capacity is the sum of capacities of all outgoing links.
Parameters: - topology : Topology
The topology object whose fan-in and fan-out capacities are calculated. This topology must be annotated with link capacities.
Returns: - fan_in_out_capacities : tuple (fan_in, fan_out)
A tuple of two dictionaries, representing, respectively the fan-in and fan-out capacities keyed by node.
Notes
This function works correctly for both directed and undirected topologies. If the topology is undirected, the returned dictionaries of fan-in and fan-out capacities are identical.
Examples
>>> import fnss >>> topology = fnss.star_topology(3) >>> fnss.set_capacities_constant(topology, 10, 'Mbps') >>> in_cap, out_cap = fnss.fan_in_out_capacities(topology) >>> in_cap {0: 30, 1: 10, 2: 10, 3: 10} >>> out_cap {0: 30, 1: 10, 2: 10, 3: 10}