text: 
  
  TITLE
  Truncating the prefix of a sequence rather than the suffix
  
  COMMENTS
  11
  
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  # 🚀 Feature request
  
  Hi, tokenizers get `truncation` as an argument. When set to `True` the tokenizer will truncate the suffix of a sequence so it does not surpass the specified `max_length`. I'd like to have a functionality that truncates the prefix of the sequence, so the model will see the suffix of the sequence.
  
  ## Motivation
  
  In many applications (e.g. Dialog, and QA) the most important part of the sequence is the suffix (e.g. the question after the context, or the last response of the dialog).
  
  ## Your contribution
  
  Perhaps I'll submit a PR, but it might take me some time as I'm close to some deadlines of mine :(
  