Oren Milman added the comment:
You are right about the terminology of course. My bad.
Anyway, the bug is not related to __index__ (or nb_index), because the three
aforementioned functions are using (in case '!PyLong_Check(v)') PyArg_Parse
with the formats 'l' or 'L'.
Ultimately, convertsimple (in Python/getargs.c) would call PyLong_AsLong or
PyLong_AsLongLong (respectively).
These two (in case '!PyLong_Check(v)') only try to use nb_int, as documented:
*
https://docs.python.org/3.7/c-api/long.html?highlight=pylong_aslong#c.PyLong_AsLong
*
https://docs.python.org/3.7/c-api/long.html?highlight=pylong_aslong#c.PyLong_AsLongLong
But just in case, I ran the following:
import array
class LikeInt:
def __init__(self, intVal):
self.intVal = intVal
def __index__(self):
return self.intVal
array.array('L').append(LikeInt(0))
and got a 'TypeError: an integer is required (got type LikeInt)'
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<http://bugs.python.org/issue28298>
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