tensorflow四则运算

常量和常量运算

import tensorflow as tf
data1=tf.constant(6)
data2=tf.constant(2)
dataAdd=tf.add(data1,data2)
dataMul=tf.multiply(data1,data2)
dataSub=tf.subtract(data1,data2)
dataDiv=tf.divide(data1,data2)
with tf.Session() as sess:
    print(sess.run(dataAdd))
    print(sess.run(dataMul))
    print(sess.run(dataSub))
    print(sess.run(dataDiv))

常量和变量进行运算

data1 = tf.constant(6)
data2 = tf.Variable(2)
dataAdd = tf.add(data1,data2)
dataCopy = tf.assign(data2,dataAdd)# dataAdd ->data2
dataMul = tf.multiply(data1,data2)
dataSub = tf.subtract(data1,data2)
dataDiv = tf.divide(data1,data2)
init = tf.global_variables_initializer()
with tf.Session() as sess:
    sess.run(init)
    print(sess.run(dataAdd))
    print(sess.run(dataMul))
    print(sess.run(dataSub))
    print(sess.run(dataDiv))
    print('sess.run(dataCopy)',sess.run(dataCopy))#8->data2
    print('dataCopy.eval()',dataCopy.eval())#8+6->14->data = 14
    print('tf.get_default_session()',tf.get_default_session().run(dataCopy))
print('end!')

运行结果如下：
8
12
4
3.0
sess.run(dataCopy) 8
dataCopy.eval() 14
tf.get_default_session() 20
end!