Source.Python forums

Is it possible to get player rank?. I mean using steam api or something like that.

Look at the last 2 responses here:
http://forums.sourcepython.com/showthread.php?528

Though, I know that XE_ManUp's is no longer supported, not fully sure about the other one. I also recently stumbled upon this one:
https://github.com/ValvePython/steam

I'm not sure how to specifically get the information you are looking for, but those packages are a good place to start.

You can't get that information unless they are on your friendslist and they're ingame, or you've just played a match against or with that person.

Ok. Thanks. And as I understand it's possible to get this info of Source.Python?

Yes, it's just a python module you need to install.