Integer Partition

hi guys,
need a little bit help with that.
this is what i'm trying to recreate:
https://en.wikipedia.org/wiki/Partition_(number_theory)
(there is a bug with the parenthesis linking above. )
and here is a python implementation:
https://stackoverflow.com/questions/2065553/get-all-numbers-that-add-up-to-a-number

so essentially i'm trying to get all partitions from a number :

3->
3
2 1
1 1 1

4 ->
4
3 1
2 2
2 1 1
1 1 1 1

etc..

any help would be.. ahm, yeah.. very helpful! :)
cheers!