ASKSAGE: Sage Q&A Forum - Latest question feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Wed, 07 Mar 2018 06:21:06 -0600Flow gives error for disconnected verticeshttps://ask.sagemath.org/question/41419/flow-gives-error-for-disconnected-vertices/ When calculating the flow between to vertices which are not connected in a graph, the method returns a ValueError. I would have assumed that it would just return 0. Here's a minimal example:
G=Graph({0:[],1:[]})
G.flow(0,1) # raises the error ValueError: vertex '0' is not in the (di)graph
If on the other hand one tries the shortest_path method it just returns a empty list, since there is not path between 0 and 1.
G.shortest_path(0,1) #returns []AckslWed, 07 Mar 2018 06:21:06 -0600https://ask.sagemath.org/question/41419/