There's a link to Wii.py github page on the project home page.
Also, if you read Help>about Qwad > Thanks:
"Thanks to Wii.py team: Xuzz, SquidMan, megazig, TheLemonMan, |Omega, and Matt_P. Qwad is only a frontend for their unbelievably awesome framework."
If that's "no credits", tell me what...