tensorflow 2.0

import numpy as np

import matplotlib.pylab as plt

import matplotlib

 #data for plot

import tensorflow as tf

tf.enable_eager_execution()

a=tf.contrib.eager.Varaible(0.)

b = tf.contrib.eager.Variable(1.)

for iteration in range(50)

a.assign(a +b)

b.assign(b *2)

print(a.numpy())

## REFERENCE

tensorflow 2.0

https://www.youtube.com/watch?v=tXVNS-V39A0&t=4s