docstr: The KL-divergence between self policy distributions and other.
docstr_tok: ["The","KL-divergence","between","self","policy","distributions","and","other","."]
code: def kl(self, other):
      """The KL-divergence between self policy distributions and other."""
      raise NotImplementedError
  
imports: import torch
  import torch.nn.functional
  import numpy
label_desc: Use image node_id 3 for calling the PolicyDistribution obj's underlying member method code with example usage: obj.kl(other) without return types