code: def get_dist(self):
      logits = paddle.rand(shape=(self.batch_size, self.num_actions))
      dist = SoftCategoricalDistribution(logits)
      return dist
  
imports: import random
  import numpy
  import paddle
  import unittest
  import copy
  from parl.core.paddle.policy_distribution import DiagGaussianDistribution, CategoricalDistribution, SoftCategoricalDistribution
label_desc: Use image node_id 2 for calling the SoftCategoricalDistributionTest obj's underlying member method code with example usage: obj.get_dist() and returns: dist