tensorflow test

import tensorflow as tf
x = tf.Variable(0.0)
y = tf.constant(1.0)
loss = y-x
opt_op = tf.train.GradientDescentOptimizer(learning_rate=0.1)
train_op = opt_op.minimize(loss)

with tf.Session() as sess:
    sess.run(tf.global_variables_initializer())
    for i in range(10):
        _, loss, x = sess.run([train_op, loss, x])
        print("step:{}, loss:{}, x:{}".format(i, loss, x))