Untokenize. Brought to you by Python.

When writing IQABOT (see here) I needed to undo the tokenization of a rewritten query. Below is the code for a very simple Python function to “untokenize” some text.

def untokenize(sent):
     untok = ""
     punc = ['.',',','?'] # Add more punctuation
     for tok in sent:
          if tok in punc:
               untok += tok
          else:
               untok += " "+tok

return untok.lstrip()
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