from datetime import (
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date,
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time,
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timedelta,
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)
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import pickle
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import numpy as np
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import pytest
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from pandas._libs.missing import NA
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from pandas.core.dtypes.common import is_scalar
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import pandas as pd
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import pandas._testing as tm
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def test_singleton():
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assert NA is NA
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new_NA = type(NA)()
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assert new_NA is NA
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def test_repr():
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assert repr(NA) == "<NA>"
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assert str(NA) == "<NA>"
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def test_format():
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# GH-34740
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assert format(NA) == "<NA>"
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assert format(NA, ">10") == " <NA>"
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assert format(NA, "xxx") == "<NA>" # NA is flexible, accept any format spec
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assert f"{NA}" == "<NA>"
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assert f"{NA:>10}" == " <NA>"
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assert f"{NA:xxx}" == "<NA>"
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def test_truthiness():
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msg = "boolean value of NA is ambiguous"
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with pytest.raises(TypeError, match=msg):
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bool(NA)
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with pytest.raises(TypeError, match=msg):
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not NA
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def test_hashable():
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assert hash(NA) == hash(NA)
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d = {NA: "test"}
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assert d[NA] == "test"
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@pytest.mark.parametrize(
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"other", [NA, 1, 1.0, "a", b"a", np.int64(1), np.nan], ids=repr
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)
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def test_arithmetic_ops(all_arithmetic_functions, other):
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op = all_arithmetic_functions
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if op.__name__ in ("pow", "rpow", "rmod") and isinstance(other, (str, bytes)):
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pytest.skip(reason=f"{op.__name__} with NA and {other} not defined.")
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if op.__name__ in ("divmod", "rdivmod"):
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assert op(NA, other) is (NA, NA)
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else:
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if op.__name__ == "rpow":
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# avoid special case
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other += 1
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assert op(NA, other) is NA
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@pytest.mark.parametrize(
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"other",
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[
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NA,
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1,
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1.0,
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"a",
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b"a",
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np.int64(1),
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np.nan,
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np.bool_(True),
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time(0),
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date(1, 2, 3),
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timedelta(1),
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pd.NaT,
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],
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)
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def test_comparison_ops(comparison_op, other):
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assert comparison_op(NA, other) is NA
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assert comparison_op(other, NA) is NA
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@pytest.mark.parametrize(
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"value",
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[
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0,
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0.0,
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-0,
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-0.0,
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False,
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np.bool_(False),
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np.int_(0),
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np.float_(0),
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np.int_(-0),
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np.float_(-0),
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],
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)
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@pytest.mark.parametrize("asarray", [True, False])
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def test_pow_special(value, asarray):
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if asarray:
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value = np.array([value])
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result = NA**value
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if asarray:
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result = result[0]
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else:
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# this assertion isn't possible for ndarray.
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assert isinstance(result, type(value))
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assert result == 1
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@pytest.mark.parametrize(
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"value", [1, 1.0, True, np.bool_(True), np.int_(1), np.float_(1)]
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)
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@pytest.mark.parametrize("asarray", [True, False])
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def test_rpow_special(value, asarray):
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if asarray:
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value = np.array([value])
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result = value**NA
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if asarray:
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result = result[0]
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elif not isinstance(value, (np.float_, np.bool_, np.int_)):
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# this assertion isn't possible with asarray=True
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assert isinstance(result, type(value))
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assert result == value
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@pytest.mark.parametrize("value", [-1, -1.0, np.int_(-1), np.float_(-1)])
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@pytest.mark.parametrize("asarray", [True, False])
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def test_rpow_minus_one(value, asarray):
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if asarray:
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value = np.array([value])
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result = value**NA
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if asarray:
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result = result[0]
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assert pd.isna(result)
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def test_unary_ops():
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assert +NA is NA
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assert -NA is NA
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assert abs(NA) is NA
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assert ~NA is NA
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def test_logical_and():
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assert NA & True is NA
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assert True & NA is NA
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assert NA & False is False
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assert False & NA is False
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assert NA & NA is NA
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msg = "unsupported operand type"
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with pytest.raises(TypeError, match=msg):
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NA & 5
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def test_logical_or():
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assert NA | True is True
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assert True | NA is True
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assert NA | False is NA
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assert False | NA is NA
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assert NA | NA is NA
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msg = "unsupported operand type"
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with pytest.raises(TypeError, match=msg):
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NA | 5
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def test_logical_xor():
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assert NA ^ True is NA
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assert True ^ NA is NA
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assert NA ^ False is NA
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assert False ^ NA is NA
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assert NA ^ NA is NA
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msg = "unsupported operand type"
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with pytest.raises(TypeError, match=msg):
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NA ^ 5
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def test_logical_not():
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assert ~NA is NA
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@pytest.mark.parametrize("shape", [(3,), (3, 3), (1, 2, 3)])
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def test_arithmetic_ndarray(shape, all_arithmetic_functions):
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op = all_arithmetic_functions
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a = np.zeros(shape)
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if op.__name__ == "pow":
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a += 5
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result = op(NA, a)
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expected = np.full(a.shape, NA, dtype=object)
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tm.assert_numpy_array_equal(result, expected)
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def test_is_scalar():
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assert is_scalar(NA) is True
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def test_isna():
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assert pd.isna(NA) is True
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assert pd.notna(NA) is False
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def test_series_isna():
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s = pd.Series([1, NA], dtype=object)
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expected = pd.Series([False, True])
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tm.assert_series_equal(s.isna(), expected)
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def test_ufunc():
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assert np.log(NA) is NA
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assert np.add(NA, 1) is NA
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result = np.divmod(NA, 1)
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assert result[0] is NA and result[1] is NA
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result = np.frexp(NA)
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assert result[0] is NA and result[1] is NA
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def test_ufunc_raises():
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msg = "ufunc method 'at'"
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with pytest.raises(ValueError, match=msg):
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np.log.at(NA, 0)
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def test_binary_input_not_dunder():
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a = np.array([1, 2, 3])
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expected = np.array([NA, NA, NA], dtype=object)
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result = np.logaddexp(a, NA)
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tm.assert_numpy_array_equal(result, expected)
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result = np.logaddexp(NA, a)
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tm.assert_numpy_array_equal(result, expected)
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# all NA, multiple inputs
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assert np.logaddexp(NA, NA) is NA
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result = np.modf(NA, NA)
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assert len(result) == 2
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assert all(x is NA for x in result)
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def test_divmod_ufunc():
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# binary in, binary out.
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a = np.array([1, 2, 3])
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expected = np.array([NA, NA, NA], dtype=object)
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result = np.divmod(a, NA)
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assert isinstance(result, tuple)
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for arr in result:
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tm.assert_numpy_array_equal(arr, expected)
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tm.assert_numpy_array_equal(arr, expected)
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result = np.divmod(NA, a)
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for arr in result:
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tm.assert_numpy_array_equal(arr, expected)
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tm.assert_numpy_array_equal(arr, expected)
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def test_integer_hash_collision_dict():
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# GH 30013
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result = {NA: "foo", hash(NA): "bar"}
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assert result[NA] == "foo"
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assert result[hash(NA)] == "bar"
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def test_integer_hash_collision_set():
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# GH 30013
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result = {NA, hash(NA)}
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assert len(result) == 2
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assert NA in result
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assert hash(NA) in result
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def test_pickle_roundtrip():
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# https://github.com/pandas-dev/pandas/issues/31847
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result = pickle.loads(pickle.dumps(NA))
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assert result is NA
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def test_pickle_roundtrip_pandas():
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result = tm.round_trip_pickle(NA)
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assert result is NA
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@pytest.mark.parametrize(
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"values, dtype", [([1, 2, NA], "Int64"), (["A", "B", NA], "string")]
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)
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@pytest.mark.parametrize("as_frame", [True, False])
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def test_pickle_roundtrip_containers(as_frame, values, dtype):
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s = pd.Series(pd.array(values, dtype=dtype))
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if as_frame:
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s = s.to_frame(name="A")
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result = tm.round_trip_pickle(s)
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tm.assert_equal(result, s)
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