def engineList(self, targets):
"""Parse the targets argument into a list of valid engine objects.
:Parameters:
targets : int, list of ints or 'all'
The targets argument to be parsed.
:Returns: List of engine objects.
:Exception:
InvalidEngineID
If targets is not valid or if an engine is not registered.
"""
if isinstance(targets, int):
if targets not in self.engines.keys():
log.msg("Engine with id %i is not registered" % targets)
raise error.InvalidEngineID("Engine with id %i is not registered" % targets)
else:
return [self.engines[targets]]
elif isinstance(targets, (list, tuple)):
for id in targets:
if id not in self.engines.keys():
log.msg("Engine with id %r is not registered" % id)
raise error.InvalidEngineID("Engine with id %r is not registered" % id)
return map(self.engines.get, targets)
elif targets == 'all':
eList = self.engines.values()
if len(eList) == 0:
msg = """There are no engines registered.
Check the logs in ~/.ipython/log if you think there should have been."""
raise error.NoEnginesRegistered(msg)
else:
return eList
else:
raise error.InvalidEngineID("targets argument is not an int, list of ints or 'all': %r"%targets)
def create_targets(ids):
if isinstance(targets, int):
engines = [targets]
elif targets=='all':
engines = ids
elif isinstance(targets, (list, tuple)):
engines = targets
for t in engines:
if not t in ids:
raise error.InvalidEngineID("engine with id %r does not exist"%t)
return engines