Python27(win): import daemon, but there is an error: No module named pwd

The pwd module is a UNIX only package, it's for managing passwords.

The package you are trying to install is daemon, which is an un-maintained package from 2014. There is a more recent package called python-daemon, which is well maintained and used for implementing daemons in UNIX systems. It also works with python3. Though again, this will not work on windows.

If you're writing an application yourself and want to do this on windows you need to install it as a service, not a daemon this stackoverflow post is old, but still relevant.