src/transformers/generation_utils.py/GenerationMixin/_get_logits_warper
class GenerationMixin:    def _get_logits_warper(
        self, top_k: int = None, top_p: float = None, temperature: float = None, num_beams: int = None
    ) -> LogitsProcessorList:
        """
        This class returns a :obj:`~transformers.LogitsProcessorList` list object that contains all relevant
        :obj:`~transformers.LogitsWarper` instances used for multinomial sampling.
        """

        # init warp parameters
        top_k = top_k if top_k is not None else self.config.top_k
        top_p = top_p if top_p is not None else self.config.top_p
        temperature = temperature if temperature is not None else self.config.temperature
        # instantiate warpers list
        warpers = LogitsProcessorList()

        # the following idea is largely copied from this PR: https://github.com/huggingface/transformers/pull/5420/files
        # all samplers can be found in `generation_utils_samplers.py`
        if temperature is not None and temperature != 1.0:
            warpers.append(TemperatureLogitsWarper(temperature))
        if top_k is not None and top_k != 0:
            warpers.append(TopKLogitsWarper(top_k=top_k, min_tokens_to_keep=(2 if num_beams > 1 else 1)))
        if top_p is not None and top_p < 1.0:
            warpers.append(TopPLogitsWarper(top_p=top_p, min_tokens_to_keep=(2 if num_beams > 1 else 1)))
        return warpers