class_docstr: Encodes/decodes between strings and integer representations.
class_docstr_tok: ["Encodes\/decodes","between","strings","and","integer","representations","."]
code: def one_hot(self, tokens: np.ndarray) -> np.ndarray:
      vecs = np.zeros((tokens.size, self.vocab_size), dtype=np.float32)
      vecs[np.arange(tokens.size), tokens] = 1
      return vecs
  
imports: import random
  from typing import Any, Dict, Generator, Optional, Tuple
  import jax.numpy
  import numpy
label_desc: Use image node_id 11 for calling the CharacterTable obj's underlying member method code with example usage: obj.one_hot(tokens) and returns: vecs