Graph.connected exception when passed empty graph

[GoogleCodeExporter]

What steps will reproduce the problem?
1. from rdflib import Graph
2. g = Graph()
3. g.connected()

What is the expected output? What do you see instead?

Expected: False

Seen:

ValueError: empty range for randrange()

function connected in graph.py at line 828
visiting = [all_nodes[random.randrange(len(all_nodes))]]
function randrange in random.py at line 179
raise ValueError, "empty range for randrange()"
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What version of the product are you using? On what operating system?

rdflib 3.0.0 Python 2.6.5, OS X Leopard

Please provide any additional information below.

Patch file atatched

Original issue reported on code.google.com by gjhigg...@gmail.com on 6 Aug 2010 at 2:27

Attachments:

• graph-connected.diff

[GoogleCodeExporter]

This issue was closed by revision r1908.

Original comment by gromgull on 28 Jan 2011 at 9:06

• Changed state: Fixed

[GoogleCodeExporter]

This issue was closed by revision 75d1edd986e2.

Original comment by gromgull on 30 Mar 2011 at 9:07