module no attribute mul?!

[Memes1]

here's the code i got
Traceback (most recent call last):
File "rbm_chords.py", line 95, in
W_adder = tf.mul(lr/size_bt, tf.sub(tf.matmul(tf.transpose(x), h), tf.matmul(tf.transpose(x_sample), h_sample)))
AttributeError: 'module' object has no attribute 'mul'

[YJH1987]

after tensorflow update, some functions were renamed, mul is now multiply and sub is now subtract.