</p>

<pre>
v := x  // x is evaluated exactly once
if v == nil {
	i := v                                 // type of i is type of x (interface{})
	printString("x is nil")
} else if i, isInt := v.(int); isInt {
	printInt(i)                            // type of i is int
} else if i, isFloat64 := v.(float64); isFloat64 {
	printFloat64(i)                        // type of i is float64

    *   New endpoints in `tf.image` namespace: `tf.image.extract_image_patches`
    *   New endpoints in `tf.debugging` namespace:
        `tf.debugging.check_numerics`, `tf.debugging.is_finite`,
        `tf.debugging.is_inf`, `tf.debugging.is_nan`.
    *   New endpoints in `tf.dtypes` namespace: `tf.dtypes.as_string`.
    *   New endpoints in `tf.io` namespace: `tf.io.decode_base64`,
        `tf.io.decode_compressed`, `tf.io.decode_json_example`,