Returns Conditional Probability Distribution after setting values to 1.

        Parameters
        ----------
        values: list or array_like
            A list of tuples of the form (variable_name, variable_state).
            The values on which to condition the Joint Probability Distribution.
        inplace: Boolean (default True)
            If False returns a new instance of JointProbabilityDistribution

        Examples
        --------
        >>> import numpy as np
        >>> from pgmpy.factors.discrete import JointProbabilityDistribution
        >>> prob = JointProbabilityDistribution(['x1', 'x2', 'x3'], [2, 2, 2], np.ones(8)/8)
        >>> prob.conditional_distribution([('x1', 1)])
        >>> print(prob)
        x2    x3      P(x2,x3)
        ----  ----  ----------
        x2_0  x3_0      0.2500
        x2_0  x3_1      0.2500
        x2_1  x3_0      0.2500
        x2_1  x3_1      0.2500

def conditional_distribution(self, values, inplace=True):
        """
        Returns Conditional Probability Distribution after setting values to 1.

        Parameters
        ----------
        values: list or array_like
            A list of tuples of the form (variable_name, variable_state).
            The values on which to condition the Joint Probability Distribution.
        inplace: Boolean (default True)
            If False returns a new instance of JointProbabilityDistribution

        Examples
        --------
        >>> import numpy as np
        >>> from pgmpy.factors.discrete import JointProbabilityDistribution
        >>> prob = JointProbabilityDistribution(['x1', 'x2', 'x3'], [2, 2, 2], np.ones(8)/8)
        >>> prob.conditional_distribution([('x1', 1)])
        >>> print(prob)
        x2    x3      P(x2,x3)
        ----  ----  ----------
        x2_0  x3_0      0.2500
        x2_0  x3_1      0.2500
        x2_1  x3_0      0.2500
        x2_1  x3_1      0.2500
        """
        JPD = self if inplace else self.copy()
        JPD.reduce(values)
        JPD.normalize()
        if not inplace:
            return JPD