Hi, On Tuesday, 20 August 2013 23:21:43 UTC+2, Andrew Gainer-Dewar wrote: > > How about extending the input signature of Graph.is_connected() to > include an option > > empty_graph_is_connected = False > > ? >
The problem with such a global variable is that is_connected() is used not just by humans, but also by other methods. The authors of those methods don't always know about the global variables affecting the computation; this is what caused the characteristic symmetric function mess in http://trac.sagemath.org/ticket/14885 . And even if they do, it is hard to work around this to obtain reliable behavior; one would have to change the global variable within the computation and then change it back at the end. Best regards, Darij -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/groups/opt_out.
