misc/scripts/detect_cycle.py
author Julien Cristau <julien.cristau@logilab.fr>
Tue, 08 Apr 2014 18:00:14 +0200
changeset 9675 8aabfefc8a81
parent 6198 f8dea560703f
child 10589 7c23b7de2b8d
permissions -rw-r--r--
[test] use assertNotIn where appropriate Automatically generated with: find -name unittest_*.py -o -name test_*.py | xargs sed -i -e 's/assertFalse(\([^,]*\) in \([^,]*\))/assertNotIn(\1, \2)/' plus revert of a couple false matches.


try:
    rtype, = __args__
except ValueError:
    print 'USAGE: cubicweb-ctl shell <instance> detect_cycle.py -- <relation type>'
    print

graph = {}
for fromeid, toeid in rql('Any X,Y WHERE X %s Y' % rtype):
    graph.setdefault(fromeid, []).append(toeid)

from logilab.common.graph import get_cycles

for cycle in get_cycles(graph):
    print 'cycle', '->'.join(str(n) for n in cycle)