Easy-to-install-and-use scientific graphics (plotting) package for Python 2.5.1 on Linux Ubuntu 7.1

[Dr. Colombes]

Is there an easy scientific graphics (plotting) package for Python
2.5.1 running on Ubuntu Linux 7.1 ("Gutsy Gibbon")?

A few years ago I used PyLab (a MatLab-like plotting module for
Python) on a Windows machine, but I don't know if there is a similar
easy-to-install-and-use Python 2.5.1-compatible graphics package for
Ubuntu Linux 7.1?

Thanks for any suggestions.