pyChecker complains at line 774 of tokenizer.py
No module attribute (STARSTAR) found

The section is:

                if i < len(nodelist):
                    # should be DOUBLESTAR or STAR STAR
                    t = nodelist[i][0]
                    if t == token.DOUBLESTAR:
                        node = nodelist[i+1]
                    elif t == token.STARSTAR:
                        node = nodelist[i+2]
                    else:
                        raise ValueError, "unexpected
token: %s" % t
                    names.append(node[1])
                    flags = flags | CO_VARKEYWORDS

I've verified that there is no STARSTAR in token.py.
I'd patch this to be token.STAR, which does exist, but
this module has no self tests or unit tests, so I
wouldn't be able to know if it broke anything.

My wild guess is that the intention is to refer to two
STAR tokens rather than a DOUBLESTAR token (and that is
because the increment is 2 rather than 1), but I think
that evidence is pretty slim.

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I don't see a file "tokenizer.py" in the repository, only 
"tokenize.py", which only has 262 lines. What is this 
bug about?

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Sorry, too much caffine. 

The file is compiler/transformer.py

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I think the STARSTAR should be STAR.  Jeremy, can you
confirm & fix? Also, there needs to be a unittest for this
code, apparently!

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Fixed in rev 1.33 of transformer.py
and in rev 1.80.8.1.2.1 (release22-maint branch).
Not present in earlier versions.