There are not many manuals for this package.
I want to publish pasties on pastebin.com under my username. so
pastebinit -u myuser -p mypassword file.py
not working, it is not logging in ... why?
Try
$ pastebinit -u myuser -p mypassword -i file.py
Edit: Try another host:
$ ./pastebinit -i file.py -b http://paste.ubuntu.com