from pandas import Index
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import pandas._testing as tm
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def test_pickle_preserves_object_dtype():
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# GH#43188, GH#43155 don't infer numeric dtype
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index = Index([1, 2, 3], dtype=object)
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result = tm.round_trip_pickle(index)
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assert result.dtype == object
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tm.assert_index_equal(index, result)
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