[BUG] The parameter 'topk' should transform as interger

[Autumn-Roy]

In the file
generate.py.

topk = sys.argv[3] will get a string type value. But in line for cdr,ppl in new_res[:topk]:, the 'topk' should be a int type.
So it should add an transform line to change the value type. This is my way:

topk = sys.argv[3]
    if not isinstance(topk, int):
        topk = int(topk)