[rset] Deprecate the 'encoded' argument to ResultSet.printable_rql()
It's hardly used at all, and when used inside CubicWeb, it's only set as
false. Better make sure that this function always returns a proper
unicode string and let the caller handle conversion on its own.
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)