code: def __init__(self, pool_cls=DeferredExecutionPool):
      self._pools = ParameterizedDefaultDict(pool_cls)
  
imports: import threading
  from functools import wraps
  import attr
  import six
label_desc: Use image node_id 1 to create a new DeferredExecution object from inherited base classes: object with example: obj = DeferredExecution(pool_cls)