wrong default algorithm for computing the diameter of weighted graphs #40013
Description
Steps To Reproduce
sage: G = graphs.PetersenGraph()
sage: G.diameter(by_weight=True)Expected Behavior
2.0Actual Behavior
ValueError Traceback (most recent call last)
Cell In[2], line 1
----> 1 G.diameter(by_weight=True)
File ~/sage/src/sage/graphs/graph.py:5144, in Graph.diameter(self, by_weight, algorithm, weight_function, check_weight)
5142 if algorithm in ['standard', '2sweep', 'multi-sweep', 'iFUB']:
5143 if by_weight:
-> 5144 raise ValueError("algorithm '" + algorithm + "' does not work" +
5145 " on weighted graphs")
5146 from sage.graphs.distances_all_pairs import diameter
5147 return diameter(self, algorithm=algorithm)
ValueError: algorithm 'iFUB' does not work on weighted graphsAdditional Information
Algorithm 'iFUB' is currently only implemented for unweighted graphs.
The default algorithm should be 'DHV' for weighted graphs and 'iFUB' for unweighted graphs.
Environment
- OS: all
- Sage Version: 10.7.beta1
Checklist
- I have searched the existing issues for a bug report that matches the one I want to file, without success.
- I have read the documentation and troubleshoot guide