Python question. Syntax error?

Question

I'm new to Python and I have an example script that has a syntax error, but I can't see what's wrong. Here it is:

class SimpleGraph:
    def __init__(self):
        self._spo = {}
        self._pos = {}
        self._osp = {}
        
    def add(self, (sub, pred, obj)):

I get a syntax error on the ( before sub. I'm running Python 3.1. Any ideas?

Silent · Accepted Answer

Why do you have parentheses around the last three parameters to the add function? 

If you're trying to make the function take a tuple as a parameter, you can't do it that way in Python 3. That was possible in previous versions of Python, but not anymore. 

Python 3 and Python 2 are not compatible languages. If you're running Python 3, don't use example code written for Python 2;  you'll just end up with a lot of confusion and things that don't work.

Python question. Syntax error?

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