class_docstr: Beta Distribution 
class_docstr_tok: ["Beta","Distribution"]
docstr: Returns mean 
docstr_tok: ["Returns","mean"]
code: def get_mean(self):
      """Returns mean"""
      return self.alpha / (self.alpha + self.beta)
  
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 7 for calling the Beta obj's underlying member method code with example usage: obj.get_mean() and returns: unknown