#9362: Invalidate None as a vertex label.
----------------------------+-----------------------------------------------
   Reporter:  boothby       |          Owner:  jason, mvngu, ncohen, rlm
       Type:  defect        |         Status:  needs_review             
   Priority:  major         |      Milestone:                           
  Component:  graph theory  |       Keywords:  sd35.5                   
Work_issues:                |       Upstream:  N/A                      
   Reviewer:                |         Author:                           
     Merged:                |   Dependencies:  #11739                   
----------------------------+-----------------------------------------------
Changes (by zimmerma):

  * status:  needs_info => needs_review


Comment:

 ok, I agree that using None as special value in {{{add_edge}}} makes
 sense, and is consistent
 with {{{add_vertex}}}. Thus I put it back to needs review.

 Paul

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9362#comment:9>
Sage <http://www.sagemath.org>
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