class_docstr: MNIST classification task.
class_docstr_tok: ["MNIST","classification","task","."]
code: def step(
      self, state: TaskState, action: jnp.ndarray
  ) -> Tuple[TaskState, jnp.ndarray, jnp.ndarray]:
      return self._step_fn(state, action)
  
file_path: evojax/evojax/task/mnist.py
imports: import sys
  import numpy
  from typing import Tuple
  import jax
  import jax.numpy
  from jax import random
  from flax.struct import dataclass
  from evojax.task.base import VectorizedTask
  from evojax.task.base import TaskState
label_desc: Use image node_id 3 for calling the MNIST obj's underlying member method code with example usage: obj.step(state, action) and returns: self