from pandas import Series
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class TestSparseAccessor:
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def test_sparse_accessor_updates_on_inplace(self):
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ser = Series([1, 1, 2, 3], dtype="Sparse[int]")
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return_value = ser.drop([0, 1], inplace=True)
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assert return_value is None
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assert ser.sparse.density == 1.0
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