Converting OpenCV Haar Cascades format

I try to Convert OpenCV Haar Cascades format by the script on github, error happened like this:

usage: [-h] [-i] [-n NAME] [-s STAGES] [-c] file error: the following arguments are required: file

Could you help me out?

You need to provide an XML Haar cascade file:

python2 cascade.xml

Note please search the forums before posting.

Thx you so much for your reply!