class_docstr: Discrete Uniform Distribution 
class_docstr_tok: ["Discrete","Uniform","Distribution"]
docstr: Returns variance 
code: def get_variance(self):
      """Returns variance"""
      return (np.power((self.upper - self.lower + 1), 2) - 1) / 12
  
imports: from __future__ import absolute_import
  import numpy
  from .distribution import Discrete
  from ..exd import domains
label_desc: Use image node_id 7 for calling the DiscreteUniform obj's underlying member method code with example usage: obj.get_variance() and returns: unknown