class_docstr: Event interface, defining statistics emitted by the A2CTrainer.
class_docstr_tok: ["Event","interface",",","defining","statistics","emitted","by","the","A2CTrainer","."]
docstr: gradient norm of the step policies
docstr_tok: ["gradient","norm","of","the","step","policies"]
code: def policy_grad_norm(self, substep_key: int, value: float):
      """gradient norm of the step policies"""
  
file_path: maze/maze/train/trainers/common/actor_critic/actor_critic_events.py
imports: from abc import ABC
  import numpy
  from maze.core.log_stats.event_decorators import define_stats_grouping, define_epoch_stats
label_desc: Use image node_id 6 for calling the ActorCriticEvents obj's underlying member method code with example usage: obj.policy_grad_norm(substep_key, value) without return types