class_docstr: Base class for factors representing various multivariate
  representations.
code: def is_valid_cpd(self):
      return self.distribution.is_valid_cpd()
  
imports: import types
  import numpy
  import scipy.integrate
  from pgmpy.factors.base import BaseFactor
  from pgmpy.factors.distributions import GaussianDistribution, CustomDistribution
label_desc: Use image node_id 12 for calling the ContinuousFactor obj's underlying member method code with example usage: obj.is_valid_cpd() and returns: self