def get_activation(activation_name):
    if (activation_name == 'sigmoid'):
        return tf.nn.sigmoid
    elif (activation_name == 'relu'):
        return tf.nn.relu
    elif (activation_name == 'tanh'):
        return tf.nn.tanh
    elif (activation_name == 'elu'):
        return tf.nn.elu
    else:
        print('>>> Can not apply your activation <<<')
def get_activation(activation_name):
    if (activation_name == 'sigmoid'):
        return tf.nn.sigmoid
    elif (activation_name == 'relu'):
        return tf.nn.relu
    elif (activation_name == 'tanh'):
        return tf.nn.tanh
    elif (activation_name == 'elu'):
        return tf.nn.elu
    else:
        print('>>> Can not apply your activation <<<')