class_docstr: beam with text, optical and textual score
code: def __str__(self):
      return (
          '"'
          + self.getText()
          + '"'
          + ";"
          + str(self.getPrTotal())
          + ";"
          + str(self.getPrTextual())
          + ";"
          + str(self.textual.prUnnormalized)
      )
  
imports: from __future__ import division
  from __future__ import print_function
  import copy
label_desc: Use image node_id 10 for calling the Beam obj's underlying member method code with example usage: obj.__str__() and returns: unknown