Right, I was thinking something along that, maybe it was a built in function that returns true
Not a function, its an object of type bool.The object has a value of True in expressions but as Tony says it has a string representation (what you see when you print it) of 'True'.
You can see this
EDIT: Interesting note, True = False is illegal in python 3 (at least in my version). It seems that they are now keywords.