class_docstr: Observation normalizer.
class_docstr_tok: ["Observation","normalizer","."]
code: def get_init_params(self) -> jnp.ndarray:
      return jnp.zeros(1 + self._obs_size * 2)
  
file_path: evojax/evojax/obs_norm.py
imports: import numpy
  from typing import Tuple
  from functools import partial
  import jax
  import jax.numpy
label_desc: Use image node_id 4 for calling the ObsNormalizer obj's underlying member method code with example usage: obj.get_init_params() and returns: jnp