text: """
  Functions parsing the config optimizer options
  """
  
  import tensorflow as tf
  
  
  def build_optimizer(optimizer_config: dict):
      """
      Parsing the optimiser options and parameters
      from config dictionary.
  
      :param optimizer_config: unpacked dictionary for
        the optimiser returned from yaml.load, optimiser options
        and parameters
      :return: tf.keras.optimizers object
      """
      assert isinstance(optimizer_config, dict)
  
      if optimizer_config["name"] == "adam":
          return tf.keras.optimizers.Adam(**optimizer_config["adam"])
      elif optimizer_config["name"] == "sgd":
          return tf.keras.optimizers.SGD(**optimizer_config["sgd"])
      elif optimizer_config["name"] == "rms":
          return tf.keras.optimizers.RMSprop(**optimizer_config["rms"])
      else:
          raise ValueError("Unknown optimizer")
  