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import operator
from typing import cast
from sqlalchemy import Column
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
class TestGenerics(fixtures.TestBase):
def test_traversible_is_generic(self):
"""test #6759"""
col = Column[int]
# looked in the source for typing._GenericAlias.
# col.__origin__ is Column, but it's not public API.
# __reduce__ could change too but seems good enough for now
eq_(cast(object, col).__reduce__(), (operator.getitem, (Column, int)))
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