TST: dtype related test failures on 32bit system

[fangchenli]

1. tests/test_algos.py:TestHashTable:test_lookup_nan TST: 32bit dtype compat #36579 #36584
2. tests/test_algos.py:TestHashTable:test_lookup_overflow TST: 32bit dtype compat #36579 #36584
3. tests/indexes/test_base.py:test_get_indexer_non_unique_wrong_dtype TST: 32bit dtype compat #36579 #36584
4. tests/indexes/period/test_indexing.py:TestGetIndexer:test_get_indexer_non_unique TST: 32bit dtype compat #36579 #36584

E       AssertionError: numpy array are different
E       
E       Attribute "dtype" are different
E       [left]:  int32
E       [right]: int64

[fangchenli]

There are several new failures reported by #35898.

________________________ test_stat_method[var-kwargs0] _________________________

pandasmethname = 'var', kwargs = {'ddof': 0}

    @pytest.mark.parametrize(
        "pandasmethname, kwargs",
        [
            ("var", {"ddof": 0}),
            ("var", {"ddof": 1}),
            ("kurtosis", {}),
            ("skew", {}),
            ("sem", {}),
        ],
    )
    def test_stat_method(pandasmethname, kwargs):
        s = pd.Series(data=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6, np.nan, np.nan], dtype="Float64")
        pandasmeth = getattr(s, pandasmethname)
        result = pandasmeth(**kwargs)
        s2 = pd.Series(data=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6], dtype="float64")
        pandasmeth = getattr(s2, pandasmethname)
        expected = pandasmeth(**kwargs)
>       assert expected == result
E       assert 0.029166666666666664 == 0.02916666666666666

pandas/tests/arrays/floating/test_function.py:91: AssertionError
________________________ test_stat_method[var-kwargs1] _________________________

pandasmethname = 'var', kwargs = {'ddof': 1}

    @pytest.mark.parametrize(
        "pandasmethname, kwargs",
        [
            ("var", {"ddof": 0}),
            ("var", {"ddof": 1}),
            ("kurtosis", {}),
            ("skew", {}),
            ("sem", {}),
        ],
    )
    def test_stat_method(pandasmethname, kwargs):
        s = pd.Series(data=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6, np.nan, np.nan], dtype="Float64")
        pandasmeth = getattr(s, pandasmethname)
        result = pandasmeth(**kwargs)
        s2 = pd.Series(data=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6], dtype="float64")
        pandasmeth = getattr(s2, pandasmethname)
        expected = pandasmeth(**kwargs)
>       assert expected == result
E       assert 0.034999999999999996 == 0.03499999999999999

pandas/tests/arrays/floating/test_function.py:91: AssertionError
______________________ test_stat_method[kurtosis-kwargs2] ______________________

pandasmethname = 'kurtosis', kwargs = {}

    @pytest.mark.parametrize(
        "pandasmethname, kwargs",
        [
            ("var", {"ddof": 0}),
            ("var", {"ddof": 1}),
            ("kurtosis", {}),
            ("skew", {}),
            ("sem", {}),
        ],
    )
    def test_stat_method(pandasmethname, kwargs):
        s = pd.Series(data=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6, np.nan, np.nan], dtype="Float64")
        pandasmeth = getattr(s, pandasmethname)
        result = pandasmeth(**kwargs)
        s2 = pd.Series(data=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6], dtype="float64")
        pandasmeth = getattr(s2, pandasmethname)
        expected = pandasmeth(**kwargs)
>       assert expected == result
E       assert -1.2000000000000002 == -1.1999999999999993

pandas/tests/arrays/floating/test_function.py:91: AssertionError
________________________ test_stat_method[sem-kwargs4] _________________________

pandasmethname = 'sem', kwargs = {}

    @pytest.mark.parametrize(
        "pandasmethname, kwargs",
        [
            ("var", {"ddof": 0}),
            ("var", {"ddof": 1}),
            ("kurtosis", {}),
            ("skew", {}),
            ("sem", {}),
        ],
    )
    def test_stat_method(pandasmethname, kwargs):
        s = pd.Series(data=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6, np.nan, np.nan], dtype="Float64")
        pandasmeth = getattr(s, pandasmethname)
        result = pandasmeth(**kwargs)
        s2 = pd.Series(data=[0.1, 0.2, 0.3, 0.4, 0.5, 0.6], dtype="float64")
        pandasmeth = getattr(s2, pandasmethname)
        expected = pandasmeth(**kwargs)
>       assert expected == result
E       assert 0.07637626158259733 == 0.07637626158259732

pandas/tests/arrays/floating/test_function.py:91: AssertionError
__________________ test_memory_usage[series-with-empty-index] __________________

index_or_series_obj = Series([], Name: a, dtype: float64)

    @pytest.mark.skipif(PYPY, reason="not relevant for PyPy")
    def test_memory_usage(index_or_series_obj):
        obj = index_or_series_obj
    
        res = obj.memory_usage()
        res_deep = obj.memory_usage(deep=True)
    
        is_object = is_object_dtype(obj) or (
            isinstance(obj, Series) and is_object_dtype(obj.index)
        )
        is_categorical = is_categorical_dtype(obj.dtype) or (
            isinstance(obj, Series) and is_categorical_dtype(obj.index.dtype)
        )
    
        if len(obj) == 0:
            expected = 0 if isinstance(obj, Index) else 80
>           assert res_deep == res == expected
E           assert 48 == 80

pandas/tests/base/test_misc.py:132: AssertionError
___________________________ test_groupby_nat_exclude ___________________________

    def test_groupby_nat_exclude():
        # GH 6992
        df = DataFrame(
            {
                "values": np.random.randn(8),
                "dt": [
                    np.nan,
                    pd.Timestamp("2013-01-01"),
                    np.nan,
                    pd.Timestamp("2013-02-01"),
                    np.nan,
                    pd.Timestamp("2013-02-01"),
                    np.nan,
                    pd.Timestamp("2013-01-01"),
                ],
                "str": [np.nan, "a", np.nan, "a", np.nan, "a", np.nan, "b"],
            }
        )
        grouped = df.groupby("dt")
    
        expected = [Index([1, 7]), Index([3, 5])]
        keys = sorted(grouped.groups.keys())
        assert len(keys) == 2
        for k, e in zip(keys, expected):
            # grouped.groups keys are np.datetime64 with system tz
            # not to be affected by tz, only compare values
            tm.assert_index_equal(grouped.groups[k], e)
    
        # confirm obj is not filtered
        tm.assert_frame_equal(grouped.grouper.groupings[0].obj, df)
        assert grouped.ngroups == 2
    
        expected = {
            Timestamp("2013-01-01 00:00:00"): np.array([1, 7], dtype=np.int64),
            Timestamp("2013-02-01 00:00:00"): np.array([3, 5], dtype=np.int64),
        }
    
        for k in grouped.indices:
>           tm.assert_numpy_array_equal(grouped.indices[k], expected[k])
E           AssertionError: numpy array are different
E           
E           Attribute "dtype" are different
E           [left]:  int32
E           [right]: int64

pandas/tests/groupby/test_groupby.py:1276: AssertionError
____________________________ test_info_int_columns _____________________________

    def test_info_int_columns():
        # GH#37245
        df = DataFrame({1: [1, 2], 2: [2, 3]}, index=["A", "B"])
        buf = StringIO()
        df.info(null_counts=True, buf=buf)
        result = buf.getvalue()
        expected = textwrap.dedent(
            """\
            <class 'pandas.core.frame.DataFrame'>
            Index: 2 entries, A to B
            Data columns (total 2 columns):
             #   Column  Non-Null Count  Dtype
            ---  ------  --------------  -----
             0   1       2 non-null      int64
             1   2       2 non-null      int64
            dtypes: int64(2)
            memory usage: 48.0+ bytes
            """
        )
>       assert result == expected
E       assert "<class 'pand...40.0+ bytes\n" == "<class 'pand...48.0+ bytes\n"
E         Skipping 257 identical leading characters in diff, use -v to show
E         - y usage: 48.0+ bytes
E         ?           ^
E         + y usage: 40.0+ bytes
E         ?           ^

pandas/tests/io/formats/test_info.py:497: AssertionError
_____________________ test_float_precision_options[c_high] _____________________

c_parser_only = <pandas.tests.io.parser.conftest.CParserHighMemory object at 0xf15966ec>

    def test_float_precision_options(c_parser_only):
        # GH 17154, 36228
        parser = c_parser_only
        s = "foo\n243.164\n"
        df = parser.read_csv(StringIO(s))
        df2 = parser.read_csv(StringIO(s), float_precision="high")
    
        tm.assert_frame_equal(df, df2)
    
        df3 = parser.read_csv(StringIO(s), float_precision="legacy")
    
>       assert not df.iloc[0, 0] == df3.iloc[0, 0]
E       assert not 243.164 == 243.164

pandas/tests/io/parser/test_c_parser_only.py:720: AssertionError
_____________________ test_float_precision_options[c_low] ______________________

c_parser_only = <pandas.tests.io.parser.conftest.CParserLowMemory object at 0xf159614c>

    def test_float_precision_options(c_parser_only):
        # GH 17154, 36228
        parser = c_parser_only
        s = "foo\n243.164\n"
        df = parser.read_csv(StringIO(s))
        df2 = parser.read_csv(StringIO(s), float_precision="high")
    
        tm.assert_frame_equal(df, df2)
    
        df3 = parser.read_csv(StringIO(s), float_precision="legacy")
    
>       assert not df.iloc[0, 0] == df3.iloc[0, 0]
E       assert not 243.164 == 243.164

pandas/tests/io/parser/test_c_parser_only.py:720: AssertionError
__________________________ TestPivot.test_pivot_empty __________________________

self = <pandas.tests.reshape.test_pivot.TestPivot object at 0xbe10860c>

    def test_pivot_empty(self):
        df = DataFrame(columns=["a", "b", "c"])
>       result = df.pivot("a", "b", "c")

pandas/tests/reshape/test_pivot.py:2109: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
pandas/core/frame.py:6808: in pivot
    return pivot(self, index=index, columns=columns, values=values)
pandas/core/reshape/pivot.py:477: in pivot
    return indexed.unstack(columns)
pandas/core/series.py:3886: in unstack
    return unstack(self, level, fill_value)
pandas/core/reshape/reshape.py:423: in unstack
    obj.index, level=level, constructor=obj._constructor_expanddim
pandas/core/reshape/reshape.py:118: in __init__
    self._make_selectors()
pandas/core/reshape/reshape.py:152: in _make_selectors
    remaining_labels = self.sorted_labels[:-1]
pandas/_libs/properties.pyx:33: in pandas._libs.properties.CachedProperty.__get__
    val = self.func(obj)
pandas/core/reshape/reshape.py:139: in sorted_labels
    indexer, to_sort = self._indexer_and_to_sort
pandas/_libs/properties.pyx:33: in pandas._libs.properties.CachedProperty.__get__
    val = self.func(obj)
pandas/core/reshape/reshape.py:132: in _indexer_and_to_sort
    indexer = libalgos.groupsort_indexer(comp_index, ngroups)[0]
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   def groupsort_indexer(const int64_t[:] index, Py_ssize_t ngroups):
E   ValueError: Buffer dtype mismatch, expected 'const int64_t' but got 'int'

pandas/_libs/algos.pyx:177: ValueError

[fangchenli]

Comment on xfailed test: On 32-bit system, the output dtype is also int64. Is this a bug?

____________________________ test_info_int_columns _____________________________

    def test_info_int_columns():
        # GH#37245
        df = DataFrame({1: [1, 2], 2: [2, 3]}, index=["A", "B"])
        buf = StringIO()
        df.info(null_counts=True, buf=buf)
        result = buf.getvalue()
        expected = textwrap.dedent(
            """\
            <class 'pandas.core.frame.DataFrame'>
            Index: 2 entries, A to B
            Data columns (total 2 columns):
             #   Column  Non-Null Count  Dtype
            ---  ------  --------------  -----
             0   1       2 non-null      int64
             1   2       2 non-null      int64
            dtypes: int64(2)
            memory usage: 48.0+ bytes
            """
        )
>       assert result == expected
E       assert "<class 'pand...40.0+ bytes\n" == "<class 'pand...48.0+ bytes\n"
E         Skipping 257 identical leading characters in diff, use -v to show
E         - y usage: 48.0+ bytes
E         ?           ^
E         + y usage: 40.0+ bytes
E         ?           ^

pandas/tests/io/formats/test_info.py:497: AssertionError