class_docstr: A `Goodman & Weare (2010)
  <https://msp.org/camcos/2010/5-1/p04.xhtml>`_ "walk move" with
  parallelization as described in `Foreman-Mackey et al. (2013)
  <https://arxiv.org/abs/1202.3665>`_.
  
  :param s: (optional)
      The number of helper walkers to use. By default it will use all the
      walkers in the complement.
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code: def __init__(self, s=None, **kwargs):
      self.s = s
      super(WalkMove, self).__init__(**kwargs)
  
imports: import numpy
  from .red_blue import RedBlueMove
label_desc: Use image node_id 1 to create a new WalkMove object from inherited base classes: RedBlueMove with example: obj = WalkMove(s)