is there a tutorial for creating packages in python?

[krishnakant Mane]

hello all,
I have got a lot of sets of functions and classes that do related
work.  so just like we get python libraries I too need to create such
libraries often called packages.
I want to put my code to re-use so will create these libraries and put
in the site-libs folder.
can any one suggest me a good tutorial on line which can teach me to
develop python packages and modules and most importantly to put them
in libraries?
I saw the official python tutorial and I think chapter 6 has quite a
bit on that.
but not what I could term as some thing complete in knowledge that one
needs to create libraries as huge as wxpython etc.

thanking all.
Krishnakant.