class_docstr: textual score of beam
code: def __init__(self, text=""):
      self.text = text
      self.wordHist = []  # history of words so far
      self.wordDev = ""  # developing word
      self.prUnnormalized = 1.0
      self.prTotal = 1.0
  
imports: from __future__ import division
  from __future__ import print_function
  import copy
label_desc: Use image node_id 1 to create a new Textual object  with example: obj = Textual(text)