class_docstr: Poisson Proposal Distribution.
class_docstr_tok: ["Poisson","Proposal","Distribution","."]
code: def __call__(self):
      return nr.poisson(lam=self.s, size=np.size(self.s)) - self.s
  
imports: from __future__ import division
  import scipy.linalg
  import numpy
  import numpy.random
label_desc: Use image node_id 1 for calling the PoissonProposal obj's underlying member method code with example usage: obj.__call__() and returns: unknown