generate.py have the "SyntaxError: invalid syntax"

[Amforever]

After training the network for about 700 times, i use generate.py to generate a wav.
python generate.py --wav_out_path=generated.wav --samples 16000 ./logdir/train/2019-01-03T09-10-58/model.ckpt-700 . But there is a SyntaxError in the generate.py as

File "generate.py", line 170
var.name[:-2]: var for var in tf.global_variables()
^
SyntaxError: invalid syntax

HOW CAN I generate a wav.