windows下python机器库的安装

1.下载python

2.下载tensotflow

pip install numpy-i https://pypi.tuna.tsinghua.edu.cn/simple/

pip install scipy-i https://pypi.tuna.tsinghua.edu.cn/simple/

pip install tensorflow -i https://pypi.tuna.tsinghua.edu.cn/simple/

pip install keras -i https://pypi.tuna.tsinghua.edu.cn/simple/

pip install h5py

下面是第一个tensorflow程序

import tensorflow as tf
import numpy as np
#create data
x_data=np.random.rand(100).astype(np.float32)
y_data=x_data*0.1+0.3

###create tensorflow structure start ###
Weights=tf.Variable(tf.random_uniform([1],-1.0,1.0))
biases=tf.Variable(tf.zeros([1]))

y=Weights*x_data+biases

loss=tf.reduce_mean(tf.square(y-y_data))
optimizer=tf.train.GradientDescentOptimizer(0.5)
train=optimizer.minimize(loss)

init=tf.initialize_all_variables()

####create tensorflow structure end ###

sess=tf.Session()
sess.run(init) #Very important

for step in range(201):
    sess.run(train)
    if step%20==0:
        print(step,sess.run(Weights),sess.run(biases))