code: def _update_tokens(self, write_token=True, override=None,
                         patch_skip=False):
          
          next_token = next(self.tokens)
  
          patch_value = ''
          patch_tokens = ''
  
          if self.pfile and write_token:
              token = override if override else self.token
              patch_value += token
  
          while next_token[0] in self.comment_tokens + whitespace:
              if self.pfile:
                  if next_token[0] in self.comment_tokens:
                      while not next_token == '\n':
                          patch_tokens += next_token
                          next_token = next(self.tokens)
                  patch_tokens += next_token
  
              # Several sections rely on StopIteration to terminate token search
              # If that occurs, dump the patched tokens immediately
              try:
                  next_token = next(self.tokens)
              except StopIteration:
                  if not patch_skip or next_token in ('=', '(', '%'):
                      patch_tokens = patch_value + patch_tokens
  
                  if self.pfile:
                      self.pfile.write(patch_tokens)
                  raise
  
          # Write patched values and whitespace + comments to file
          if not patch_skip or next_token in ('=', '(', '%'):
              patch_tokens = patch_value + patch_tokens
  
          if self.pfile:
              self.pfile.write(patch_tokens)
  
          # Update tokens, ignoring padding
          self.token, self.prior_token = next_token, self.token
docs: Update tokens to the next available values.