langchain/llms/rwkv.py/RWKV/rwkv_generate
class RWKV:    def rwkv_generate(self, prompt: str) -> str:
        self.model_state = None
        self.model_tokens = []
        logits = self.run_rnn(self.tokenizer.encode(prompt).ids)
        begin = len(self.model_tokens)
        out_last = begin

        occurrence: Dict = {}

        decoded = ""
        for i in range(self.max_tokens_per_generation):
            for n in occurrence:
                logits[n] -= (
                    self.penalty_alpha_presence
                    + occurrence[n] * self.penalty_alpha_frequency
                )
            token = self.pipeline.sample_logits(
                logits, temperature=self.temperature, top_p=self.top_p
            )

            END_OF_TEXT = 0
            if token == END_OF_TEXT:
                break
            if token not in occurrence:
                occurrence[token] = 1
            else:
                occurrence[token] += 1

            logits = self.run_rnn([token])
            xxx = self.tokenizer.decode(self.model_tokens[out_last:])
            if "\ufffd" not in xxx:  # avoid utf-8 display issues
                decoded += xxx
                out_last = begin + i + 1
                if i >= self.max_tokens_per_generation - 100:
                    break

        return decoded