def _get_a(self, _type):
""" Gets an instance implementing type <_type> """
tmp = self._get_all(_type)
ret = pick(tmp)
if len(tmp) != 1:
self.l.warn(("get_a: %s all implement %s; " +
"picking %s") % (tmp, _type, ret))
return ret
def get_a(self, _type):
return pick(self.get_all(_type))