code: def _generate_action_normalizer(self):
      action_norm_vector = []
      price_0 = self.price_array[0]
      for price in price_0:
          x = len(str(price)) - 7
          action_norm_vector.append(1 / ((10) ** x))
  
      self.action_norm_vector = np.asarray(action_norm_vector)
  
file_path: FinRL/finrl/meta/env_cryptocurrency_trading/env_multiple_crypto.py
imports: from __future__ import annotations
  import numpy
label_desc: Use image node_id 6 for calling the CryptoEnv obj's underlying member method code with example usage: obj._generate_action_normalizer() without return types