Python is build-in in the most common distros, so you need only a nice editor. Geany, gedit should work fine (dunno for KDE).

if you like to configure everythink by yourself choose somethink like Gentoo, Arch or etc...

If you dont - there are many options: ubuntu, fedora, opensuse, mandriva, mint maybe...

seems to me that this topic is for "New to linux". and Be careful when you doublepost, they can get ya... ;P

Any distribution will run python. It's just another application to the kernel. Most distributions have the python application and all modules you could want (say python-tk). If you prefer not to use one of the pre-packaged python from the repository you can build it from source.

enlisy.

almost all of the system tools were written in python.

Yes your right.