Traceback (most recent call last):


 "err.py", line 4, in <module>

x |= x
TypeError: unsupported operand type(s) for |=: 'list' and 'list'

Traceback (most recent call last):


 "hae.py", line 295, in <module>

main()


 "hae.py", line 275, in main

total_cost.extend(np_loss * np_num_seqs)
TypeError: unsupported operand type(s) for *: 'NoneType' and 'long'
