Opened 5 years ago

Closed 5 years ago

#16257 closed defect (fixed)

Unnatural syntax of G.relabel()

Reported by: ncohen Owned by:
Priority: major Milestone: sage-6.3
Component: graph theory Keywords:
Cc: Merged in:
Authors: Nathann Cohen Reviewers: Pedro Cruz
Report Upstream: N/A Work issues:
Branch: b164033 (Commits) Commit: b16403318006a27e6861558693ad8a76cc4ce4df
Dependencies: Stopgaps:

Description

This was reported on sage-support by Pedro Cruz: 

sage: G = graphs.PetersenGraph()
sage: G.relabel( [ i+1 for i in range(G.order()) ], inplace=True )
sage: G.relabel( [ i+1 for i in range(G.order()) ], inplace=True )

This is because relabeling with a list as an argument only works when the graph's vertices are 0,...,n-1. With this branch this syntax always works, by using for the graph's vertices the order given by G.vertices(). Should not lead to any confusion I hope.

Nathann

Change History (9)

comment:1 Changed 5 years ago by ncohen

  • Branch set to u/ncohen/16257
  • Status changed from new to needs_review

comment:2 Changed 5 years ago by git

  • Commit set to b05052ef8ee185fe625ff0a61a45c4b0a82eaeb4

Branch pushed to git repo; I updated commit sha1. New commits:

​b05052etrac #16257: Unnatural syntax of G.relabel()

comment:3 Changed 5 years ago by git

  • Commit changed from b05052ef8ee185fe625ff0a61a45c4b0a82eaeb4 to b16403318006a27e6861558693ad8a76cc4ce4df

Branch pushed to git repo; I updated commit sha1. New commits:

​b164033trac #16257: Broken doctests

comment:4 Changed 5 years ago by jpedro

  • Status changed from needs_review to positive_review

I've done the following instructions and checked that the reported situation has been solved. 

sage: G = graphs.PetersenGraph()
sage: G.relabel( [1,2,3,4,5,6,7,8,9,10], inplace=True )
sage: G.relabel( [1,2,3,4,5,6,7,8,9,10], inplace=True )
sage: G.vertices()
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
sage: G.relabel( lambda i: i+1, inplace=True )
sage: G.vertices()
[2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
sage: G.relabel( [1,2,3,4,5,6,7,8,9,10], inplace=True )
sage: G.vertices()
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Also, sage -t graphs/ got "All tests passed!".

Last edited 5 years ago by jpedro (previous) (diff)

comment:5 Changed 5 years ago by vbraun_spam

  • Milestone changed from sage-6.2 to sage-6.3

comment:6 Changed 5 years ago by vbraun

Reviewer name

comment:7 Changed 5 years ago by vbraun

Reviewer name

comment:8 Changed 5 years ago by ncohen

  • Reviewers set to Pedro Cruz

comment:9 Changed 5 years ago by vbraun

  • Branch changed from u/ncohen/16257 to b16403318006a27e6861558693ad8a76cc4ce4df
  • Resolution set to fixed
  • Status changed from positive_review to closed
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