class_docstr: Abstract class for Explore in :py:class:`orion.algo.pbt.pbt.PBT`
  
  The explore class is responsible for proposing new parameters for a given trial and space.
  
  This class is expected to be stateless and serve as a configurable callable object.
code: def __init__(self):
      pass
  
imports: import numpy
  from orion.core.utils import GenericFactory
  from orion.core.utils.flatten import flatten, unflatten
label_desc: Use image node_id 1 to create a new BaseExplore object  with example: obj = BaseExplore()