class_docstr: In-memory store of translations for a given phrase, and the log
  probability of the those translations
class_docstr_tok: ["In-memory","store","of","translations","for","a","given","phrase",",","and","the","log","probability","of","the","those","translations"]
code: def __init__(self):
      self.src_phrases = dict()
  
imports: import subprocess
  from collections import namedtuple
label_desc: Use image node_id 1 to create a new PhraseTable object  with example: obj = PhraseTable()