Dive into TensorFlow (3) – Init the variable

The tf.Variable class creates a tensor with an initial value that can be modified, much like a normal Python variable. This tensor stores its state in the session, so you must initialize the state of the tensor manually.

We use the tf.global_variables_initializer() function to initialize the state of all the Variable tensors.

init = tf.global_variables_initializer()
with tf.Session() as sess:

The tf.global_variables_initializer() call returns an operation that will initialize all TensorFlow variables from the graph. You call the operation using a session to initialize all the variables as shown above.

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