code: def context_chunks(self, context):
          
          N_chunks = len(self.contexts[context])
          chunks = []
          for j in xrange(N_chunks):
              chunks.append(self.context_chunk(context, j))
          return chunks
docs: Retrieves all tokens, divided into the chunks in context ``context``.
  
          Parameters
          ----------
          context : str
              Context name.
  
          Returns
          -------
          chunks : list
              Each item in ``chunks`` is a list of tokens.