class_docstr: A simple default backend that stores the chain in memory
class_docstr_tok: ["A","simple","default","backend","that","stores","the","chain","in","memory"]
docstr: The dimensions of the ensemble ``(nwalkers, ndim)``
docstr_tok: ["The","dimensions","of","the","ensemble","``","(","nwalkers",",","ndim",")","``"]
code: def shape(self):
      """The dimensions of the ensemble ``(nwalkers, ndim)``"""
      return self.nwalkers, self.ndim
  
imports: import numpy
  from ..None import autocorr
  from ..state import State
label_desc: Use image node_id 10 for calling the Backend obj's underlying member method code with example usage: obj.shape() and returns: self,  self