Add source_components method.

mdickinson / refcycle

Support for displaying and analyzing reference graphs of Python objects.

Apache License 2.0

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Add source_components method. #34

Closed mdickinson closed 10 years ago

mdickinson commented 10 years ago

This PR adds a 'source_components' method for computing the strongly connected components that are unreachable from any others; in other words, the strongly connected components from which all other vertices are reachable.