class_docstr: Laplace Proposal Distribution.
class_docstr_tok: ["Laplace","Proposal","Distribution","."]
code: def __call__(self):
      size = np.size(self.s)
      return (
          nr.standard_exponential(size=size)
          - nr.standard_exponential(size=size)
      ) * 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 LaplaceProposal obj's underlying member method code with example usage: obj.__call__() and returns: unknown