How to generate data from leakgan : leakgan error

[hhassanien]

Hello Require some help generating data using leakgan. While running leakgan versus my "test" below error shows up. would highly appreciate your assistance:

/Texygen$ python main.py -g leakgan -t real -d /data/test.txt
Traceback (most recent call last):
File "main.py", line 10, in
from models.rankgan.Rankgan import Rankgan
File "/home/Texygen/models/rankgan/Rankgan.py", line 5, in
from models.rankgan.RankganDiscriminator import Discriminator
File "/home/Texygen/models/rankgan/RankganDiscriminator.py", line 191
self.scores = tf.reshape(self.feature @ tf.transpose(self.reference, perm=[1, 0]), [-1])
^
SyntaxError: invalid syntax

please find test file attached
test.txt