code: def padded_tokens_and_mask(
      self, tokens: List[int], text_ctx: int
  ) -> Tuple[List[int], List[bool]]:
      tokens = tokens[:text_ctx]
      padding = text_ctx - len(tokens)
      padded_tokens = tokens + [self.end_token] * padding
      mask = [True] * len(tokens) + [False] * padding
      return padded_tokens, mask
  
file_path: glide-text2im/glide_text2im/tokenizer/bpe.py
imports: import gzip
  import json
  import os
  from functools import lru_cache
  from typing import List, Tuple
  import regex
label_desc: Use image node_id 4 for calling the Encoder obj's underlying member method code with example usage: obj.padded_tokens_and_mask(tokens, text_ctx) and returns: padded_tokens,  mask