ops.py 文件源码

def set_value(x, value):
    """Sets the value of a variable, from a Numpy array.
    # Arguments
        x: Tensor to set to a new value.
        value: Value to set the tensor to, as a Numpy array
            (of the same shape).
    """
    value = np.asarray(value)
    tf_dtype = _convert_string_dtype(x.dtype.name.split('_')[0])
    if hasattr(x, '_assign_placeholder'):
        assign_placeholder = x._assign_placeholder
        assign_op = x._assign_op
    else:
        assign_placeholder = tf.placeholder(tf_dtype, shape=value.shape)
        assign_op = x.assign(assign_placeholder)
        x._assign_placeholder = assign_placeholder
        x._assign_op = assign_op
    session = tf.get_default_session()
    session.run(assign_op, feed_dict={assign_placeholder: value})