[Python] Conditional Mutual information

The theoretical approach, i want to convert this into a python program:

Was trying to test the ditpackage for calculation of conditional mutual information from a dataset.

My code:

from __future__ import division
import numpy as np
import dit
from dit import Distribution as D
from dit.multivariate import coinformation as I
from dit.example_dists import Xor

d=Xor()
d.set_rv_names(['X','Y','Z'])
X=111010
Y=101101
Z=001011

a=dit.multivariate.coinformation(d,'XY','Z')
print(a)


While running this program,the result i always get is "1.0".
The result come as negative or positive value like "-0.0023" or "0.120"

Basically,i want to do this https://stats.stackexchange.com/questions/147401/estimating-mutual-information-using-r in Python.

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