class_docstr: Beta Distribution 
class_docstr_tok: ["Beta","Distribution"]
docstr: Returns variance 
docstr_tok: ["Returns","variance"]
code: def get_variance(self):
      """Returns variance"""
      return (self.alpha * self.beta) / (
          (np.power(self.alpha + self.beta, 2))
          * (self.alpha + self.beta + 1)
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  import numpy
  from .distribution import Continuous
  from ..exd import domains
label_desc: Use image node_id 8 for calling the Beta obj's underlying member method code with example usage: obj.get_variance() and returns: unknown