[issue28765] _sre.compile(): be more strict on types of indexgroup and groupindex

[STINNER Victor]

STINNER Victor added the comment:

> Should we check that code is exact list?

Do you mean a tuple for indexgroup? Yeah, it also seems worth it.

I just checked:
---
class Tuple(tuple):
    def __getitem__(self, index):
        return 9

a = Tuple([1, 2, 3])
print(a[0])
---

Output:
---
9
---

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<http://bugs.python.org/issue28765>
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