This documents an unmaintained version of NetworkX. Please upgrade to a maintained version and see the current NetworkX documentation.
Base exceptions and errors for NetworkX.
Harary, F. and Read, R. “Is the Null Graph a Pointless Concept?” In Graphs and Combinatorics Conference, George Washington University. New York: Springer-Verlag, 1973.
Exception raised by algorithms trying to solve a problem instance that has no feasible solution.
Exception for algorithms that should return a path when running on graphs where such a path does not exist.