code: def _compute_step(self, globalg):
      self.v = self.momentum * self.v + (1.0 - self.momentum) * globalg
      step = -self.stepsize * self.v
      return step
  
file_path: ray/rllib_contrib/es/src/rllib_es/es/optimizers.py
imports: import numpy
label_desc: Use image node_id 2 for calling the SGD obj's underlying member method code with example usage: obj._compute_step(globalg) and returns: step