Variable Variable

Variable Variable

Variable is also based on the op, it is a special tensor can be stored persistence, his value is the tensor.

Creating variables

Create a new variable with a value init_value tf.Variable (init_value = None, name = None)

Parameter Description:

assign (value): assign a new value to a variable value new session
And returns the value calculating variables: evaluate (session = None)
name: the property represents a variable name

Variable initialization

Variables must be initialized, such as

. 1 Import tensorflow AS TF
 2  
. 3  
. 4 A = tf.constant ([ . 1 , 2 , . 3 , . 4 , . 5 ])
 . 5  # Create a normally distributed random variable
 . 6  var = tf.Variable (tf.random_normal ([ 2 , . 3 ] , Mean = 0.0 , STDDEV = 1.0 ))
 . 7  
. 8  # as the display initialization OP
 . 9 init_op = tf.global_variables_initializer ()
 10  
. 11 with tf.Session () AS Sess:
 12 is      # variables must be initialized variable OP
 13 is     sess.run (init_op)
 14      print (sess.run ([a, var ]))

We will have to be called before the session init_op = tf.global_variable_initializer () to do the initial display of variables, the variables

Become a op, and then call the session sess.run (init_op) to initialize variables.

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