class_docstr: An operation to wait on a previously sent array using MPI.
  
  See Also
  --------
  MPISend
  
  Notes
  -----
  Non-differentiable.
class_docstr_tok: ["An","operation","to","wait","on","a","previously","sent","array","using","MPI",".","See","Also","--","--","--","--","MPISend","Notes","--","--","-","Non-differentiable","."]
code: def perform(self, node, inp, out):
      request = inp[0]
      request.wait()
      out[0][0] = True
  
imports: from __future__ import absolute_import, print_function, division
  import numpy
  from theano import gof
  from theano.gof import Constant, Generic, Op
  from theano.gof.sched import key_to_cmp
  from theano.tensor import tensor
  import theano
label_desc: Use image node_id 3 for calling the MPISendWait obj's underlying member method code with example usage: obj.perform(node, inp, out) without return types