class_docstr: This class represents a possible unification of a group of variables
  with each other or with tangible values.
  Parameters
  ----------
  inplace : bool
      If inplace is False, the merge method will return a new Unification
      that is independent from the previous one (which allows backtracking).
class_docstr_tok: ["This","class","represents","a","possible","unification","of","a","group","of","variables","with","each","other","or","with","tangible","values",".","Parameters","--","--","--","--","--","inplace",":","bool","If","inplace","is","False",",","the","merge","method","will","return","a","new","Unification","that","is","independent","from","the","previous","one","(","which","allows","backtracking",")","."]
docstr: For a variable v, returns a Variable that represents the tightest
  set of possible values it can take.
docstr_tok: ["For","a","variable","v",",","returns","a","Variable","that","represents","the","tightest","set","of","possible","values","it","can","take","."]
code: def __getitem__(self, v):
      """
      For a variable v, returns a Variable that represents the tightest
      set of possible values it can take.
  
      """
      return self.unif.get(v, (v, None))[0]
  
imports: from __future__ import absolute_import, print_function, division
  from copy import copy
  from functools import partial
  from theano.gof.utils import ANY_TYPE, comm_guard, FALL_THROUGH, iteritems
label_desc: Use image node_id 3 for calling the Unification obj's underlying member method code with example usage: obj.__getitem__(v) and returns: self