Unable to go get package

[kirancloudworx]

executing command:
go get github.com/qiniu/py

results in error:
github.com/qiniu/py imports github.com/qiniu/errors: cannot find module providing package github.com/qiniu/errors github.com/qiniu/py imports github.com/qiniu/log: cannot find module providing package github.com/qiniu/log

This is because the imported packages "error" and "log" don't exist in the repo.
Thanks in advance.