OK, let my say I'm really excited :) i mean really excited, I've found the very first homebrew on the ps3 which can run & execute python.
Now before you start flaming i've already tried it myself & it has worked, but anyway here's the homebrew devs page:
It's a python interpreter for the ps3, it install through the otherOs feature on the ps3.
How do you Install it?
First download the files Here
In the folder you should see this
You will need to copy the folder 'ps3' to a usb device, which needs to be a FAT file system.
Once it has copied remove the USB memory stick from the computer making sure it has finished copying all the files (often, you have to "eject"
the drive to ensure it has finished) and put the USB drive into
one of the USB ports of the PS3. You are now ready to start.
* Turn on the PS3 and go to the System Settings menu, the second one
along on the XMB.
Navigate down to the Install Other OS option near the bottom and
You will probably be warned that there is no partition for
installing the system on the hard disk. Don't worry about it, you
won't need one. Don't forget that if you format the hard disk, you
will loose all your saved games, so you probably won't want to
format the disk. Instead, just select OK and move on.
The PS3 will now search for the file it needs to install into the
flash memory. It should find the otheros.bld file I mentioned
After a short while, you will be told that the file has been
* Now, simply follow the instructions on screen. That is navigate
to the Default System option and select it.
* Change this to Other OS. You will be able to get back to the
standard PS3 system again - don't worry!
* You will now be asked if you want to quit the PS3 system and
start the other system. You do.
* Various messages should start appearing on your screen and
after a few seconds, you should greeted by the main menu.
Congratulations! You've done it!
Getting back to the PS3 OS
When pubble is selected as the default system, it will boot
automatically when the PS3 is switched on. It will require the
USB drive to be present in order to load and if this is not
present, it will automatically return to the PS3 OS.
Yes, i have tried it out, you should get a blank screen then it'll say 'Python for the ps3' then it'll search through your USB device trying to find the main file.
There is also a game already made by this developer which is called pubble which is a little puzzle game, which you can download HERE!
Note: More Info is on the devs page, though in my opinion the documentation is one of the worst i've seen. Remember it is in early stages & it doesn't have many features yet as the dev says on his page that it lacks some features.