runbot

https://run-bot.appspot.com/support

Example

In a public channel, on your team, create a python snippet named "hello" with the contents:
response = "hello world"

Run it like so:
/run hello

and RunBot will run the python script and reply:
"hello world"

You can replace the contents of the snippet with any valid python code and RunBot will execute it. 
Note! the response variable is required