import itwmm with error

[zhixiongzuo]

Hello Sir, ths for your work.
When i install itwmm,there is something wrong with me.
First i create a python==3.5 vir envs,and install menpo with "conda install -c menpo menpo",
after that when I install itwmm,the vir envs will become python==2.7(because of menpo3d).
when I import itwmm ,it will get an error:
"hessian.py", line 95
pp = c_f * j['J_f_p'].T @ j['J_f_p'] + c_l * j['J_l_p'].T @ j['J_l_p']
^
SyntaxError: invalid syntax
"
So how can i solve this problem,pls?