230             if hasattr(info,'__depends_cubes__'):

   230             if hasattr(info,'__depends_cubes__'):

   231                 use = info.__depends_cubes__

   231                 use = info.__depends_cubes__

   232                 if not isinstance(use, dict):

   232                 if not isinstance(use, dict):

   233                     use = dict((key, None) for key in use)

   233                     use = dict((key, None) for key in use)

   234                     self.warnings.append('cube %s should define __depends_cubes__ as a dict not a list')

   234                     self.warnings.append('cube %s should define __depends_cubes__ as a dict not a list')

   236                 self.warnings.append('cube %s should define __depends_cubes__' % cube)

   236                 self.warnings.append('cube %s should define __depends_cubes__' % cube)

   237                 use = dict((key, None) for key in info.__use__)

   237                 use = dict((key, None) for key in info.__use__)

   238             for name, constraint in use.items():

   240             for name, constraint in use.items():

   239                 self.constraints.setdefault(name,set())

   241                 self.constraints.setdefault(name,set())

   240                 if constraint:

   242                 if constraint:

   241                     try:

   243                     try:

   242                         oper, version = constraint.split()

   244                         oper, version = constraint.split()