DEPS: Bump PyArrow to 6.0

.github/workflows/ubuntu.yml

@@ -31,9 +31,7 @@ jobs:
       matrix:
         env_file: [actions-38.yaml, actions-39.yaml, actions-310.yaml]
         pattern: ["not single_cpu", "single_cpu"]
-        # Don't test pyarrow v2/3: Causes timeouts in read_csv engine
-        # even if tests are skipped/xfailed
-        pyarrow_version: ["5", "6", "7"]
+        pyarrow_version: ["6", "7", "8"]
         include:
           - name: "Downstream Compat"
             env_file: actions-38-downstream_compat.yaml

ci/deps/actions-38-minimum_versions.yaml

@@ -39,7 +39,7 @@ dependencies:
   - openpyxl=3.0.7
   - pandas-gbq=0.15.0
   - psycopg2=2.8.6
-  - pyarrow=1.0.1
+  - pyarrow=5.0.0
   - pymysql=1.0.2
   - pyreadstat=1.1.2
   - pytables=3.6.1

doc/source/getting_started/install.rst

@@ -388,7 +388,7 @@ PyTables                  3.6.1              HDF5-based reading / writing
 blosc                     1.21.0             Compression for HDF5
 zlib                                         Compression for HDF5
 fastparquet               0.4.0              Parquet reading / writing
-pyarrow                   1.0.1              Parquet, ORC, and feather reading / writing
+pyarrow                   5.0.0              Parquet, ORC, and feather reading / writing
 pyreadstat                1.1.2              SPSS files (.sav) reading
 ========================= ================== =============================================================
 
@@ -402,7 +402,7 @@ pyreadstat                1.1.2              SPSS files (.sav) reading
       ========================= ================== =============================================================
       System                    Conda              PyPI
       ========================= ================== =============================================================
-      Linux                     Successful         Failed(pyarrow==3.0 Successful)
+      Linux                     Successful         Failed
       macOS                     Successful         Failed
       Windows                   Failed             Failed
       ========================= ================== =============================================================

doc/source/whatsnew/v2.0.0.rst

@@ -107,7 +107,7 @@ Optional libraries below the lowest tested version may still work, but are not c
 +-----------------+-----------------+---------+
 | Package         | Minimum Version | Changed |
 +=================+=================+=========+
-|                 |                 |    X    |
+| pyarrow         | 5.0.0           |    X    |
 +-----------------+-----------------+---------+
 
 See :ref:`install.dependencies` and :ref:`install.optional_dependencies` for more.

pandas/_testing/__init__.py

@@ -29,7 +29,7 @@
     Dtype,
     Frequency,
 )
-from pandas.compat import pa_version_under1p01
+from pandas.compat import pa_version_under5p0
 
 from pandas.core.dtypes.common import (
     is_float_dtype,
@@ -195,7 +195,7 @@
     ]
 ]
 
-if not pa_version_under1p01:
+if not pa_version_under5p0:
     import pyarrow as pa
 
     UNSIGNED_INT_PYARROW_DTYPES = [pa.uint8(), pa.uint16(), pa.uint32(), pa.uint64()]

pandas/compat/__init__.py

@@ -20,10 +20,6 @@
     np_version_under1p21,
 )
 from pandas.compat.pyarrow import (
-    pa_version_under1p01,
-    pa_version_under2p0,
-    pa_version_under3p0,
-    pa_version_under4p0,
     pa_version_under5p0,
     pa_version_under6p0,
     pa_version_under7p0,
@@ -154,10 +150,6 @@ def get_lzma_file() -> type[lzma.LZMAFile]:
 __all__ = [
     "is_numpy_dev",
     "np_version_under1p21",
-    "pa_version_under1p01",
-    "pa_version_under2p0",
-    "pa_version_under3p0",
-    "pa_version_under4p0",
     "pa_version_under5p0",
     "pa_version_under6p0",
     "pa_version_under7p0",

pandas/compat/_optional.py

@@ -31,7 +31,7 @@
     "pandas_gbq": "0.15.0",
     "psycopg2": "2.8.6",  # (dt dec pq3 ext lo64)
     "pymysql": "1.0.2",
-    "pyarrow": "1.0.1",
+    "pyarrow": "5.0.0",
     "pyreadstat": "1.1.2",
     "pytest": "6.0",
     "pyxlsb": "1.0.8",

pandas/compat/pyarrow.py

@@ -9,20 +9,12 @@
 
     _pa_version = pa.__version__
     _palv = Version(_pa_version)
-    pa_version_under1p01 = _palv < Version("1.0.1")
-    pa_version_under2p0 = _palv < Version("2.0.0")
-    pa_version_under3p0 = _palv < Version("3.0.0")
-    pa_version_under4p0 = _palv < Version("4.0.0")
     pa_version_under5p0 = _palv < Version("5.0.0")
     pa_version_under6p0 = _palv < Version("6.0.0")
     pa_version_under7p0 = _palv < Version("7.0.0")
     pa_version_under8p0 = _palv < Version("8.0.0")
     pa_version_under9p0 = _palv < Version("9.0.0")
 except ImportError:
-    pa_version_under1p01 = True
-    pa_version_under2p0 = True
-    pa_version_under3p0 = True
-    pa_version_under4p0 = True
     pa_version_under5p0 = True
     pa_version_under6p0 = True
     pa_version_under7p0 = True

pandas/core/arrays/arrow/array.py

@@ -17,10 +17,6 @@
     npt,
 )
 from pandas.compat import (
-    pa_version_under1p01,
-    pa_version_under2p0,
-    pa_version_under3p0,
-    pa_version_under4p0,
     pa_version_under5p0,
     pa_version_under6p0,
     pa_version_under7p0,
@@ -48,7 +44,7 @@
     validate_indices,
 )
 
-if not pa_version_under1p01:
+if not pa_version_under5p0:
     import pyarrow as pa
     import pyarrow.compute as pc
 
@@ -65,16 +61,12 @@
     }
 
     ARROW_LOGICAL_FUNCS = {
-        "and": NotImplemented if pa_version_under2p0 else pc.and_kleene,
-        "rand": NotImplemented
-        if pa_version_under2p0
-        else lambda x, y: pc.and_kleene(y, x),
-        "or": NotImplemented if pa_version_under2p0 else pc.or_kleene,
-        "ror": NotImplemented
-        if pa_version_under2p0
-        else lambda x, y: pc.or_kleene(y, x),
-        "xor": NotImplemented if pa_version_under2p0 else pc.xor,
-        "rxor": NotImplemented if pa_version_under2p0 else lambda x, y: pc.xor(y, x),
+        "and": pc.and_kleene,
+        "rand": lambda x, y: pc.and_kleene(y, x),
+        "or": pc.or_kleene,
+        "ror": lambda x, y: pc.or_kleene(y, x),
+        "xor": pc.xor,
+        "rxor": lambda x, y: pc.xor(y, x),
     }
 
     def cast_for_truediv(
@@ -100,38 +92,22 @@ def floordiv_compat(
         return result
 
     ARROW_ARITHMETIC_FUNCS = {
-        "add": NotImplemented if pa_version_under2p0 else pc.add_checked,
-        "radd": NotImplemented
-        if pa_version_under2p0
-        else lambda x, y: pc.add_checked(y, x),
-        "sub": NotImplemented if pa_version_under2p0 else pc.subtract_checked,
-        "rsub": NotImplemented
-        if pa_version_under2p0
-        else lambda x, y: pc.subtract_checked(y, x),
-        "mul": NotImplemented if pa_version_under2p0 else pc.multiply_checked,
-        "rmul": NotImplemented
-        if pa_version_under2p0
-        else lambda x, y: pc.multiply_checked(y, x),
-        "truediv": NotImplemented
-        if pa_version_under2p0
-        else lambda x, y: pc.divide_checked(cast_for_truediv(x, y), y),
-        "rtruediv": NotImplemented
-        if pa_version_under2p0
-        else lambda x, y: pc.divide_checked(y, cast_for_truediv(x, y)),
-        "floordiv": NotImplemented
-        if pa_version_under2p0
-        else lambda x, y: floordiv_compat(x, y),
-        "rfloordiv": NotImplemented
-        if pa_version_under2p0
-        else lambda x, y: floordiv_compat(y, x),
+        "add": pc.add_checked,
+        "radd": lambda x, y: pc.add_checked(y, x),
+        "sub": pc.subtract_checked,
+        "rsub": lambda x, y: pc.subtract_checked(y, x),
+        "mul": pc.multiply_checked,
+        "rmul": lambda x, y: pc.multiply_checked(y, x),
+        "truediv": lambda x, y: pc.divide_checked(cast_for_truediv(x, y), y),
+        "rtruediv": lambda x, y: pc.divide_checked(y, cast_for_truediv(x, y)),
+        "floordiv": lambda x, y: floordiv_compat(x, y),
+        "rfloordiv": lambda x, y: floordiv_compat(y, x),
         "mod": NotImplemented,
         "rmod": NotImplemented,
         "divmod": NotImplemented,
         "rdivmod": NotImplemented,
-        "pow": NotImplemented if pa_version_under4p0 else pc.power_checked,
-        "rpow": NotImplemented
-        if pa_version_under4p0
-        else lambda x, y: pc.power_checked(y, x),
+        "pow": pc.power_checked,
+        "rpow": lambda x, y: pc.power_checked(y, x),
     }
 
 if TYPE_CHECKING:
@@ -206,8 +182,8 @@ class ArrowExtensionArray(OpsMixin, ExtensionArray):
     _dtype: ArrowDtype
 
     def __init__(self, values: pa.Array | pa.ChunkedArray) -> None:
-        if pa_version_under1p01:
-            msg = "pyarrow>=1.0.0 is required for PyArrow backed ArrowExtensionArray."
+        if pa_version_under5p0:
+            msg = "pyarrow>=5.0.0 is required for PyArrow backed ArrowExtensionArray."
             raise ImportError(msg)
         if isinstance(values, pa.Array):
             self._data = pa.chunked_array([values])
@@ -360,8 +336,6 @@ def __arrow_array__(self, type=None):
         return self._data
 
     def __invert__(self: ArrowExtensionArrayT) -> ArrowExtensionArrayT:
-        if pa_version_under2p0:
-            raise NotImplementedError("__invert__ not implement for pyarrow < 2.0")
         return type(self)(pc.invert(self._data))
 
     def __neg__(self: ArrowExtensionArrayT) -> ArrowExtensionArrayT:
@@ -395,10 +369,7 @@ def _cmp_method(self, other, op):
                 f"{op.__name__} not implemented for {type(other)}"
             )
 
-        if pa_version_under2p0:
-            result = result.to_pandas().values
-        else:
-            result = result.to_numpy()
+        result = result.to_numpy()
         return BooleanArray._from_sequence(result)
 
     def _evaluate_op_method(self, other, op, arrow_funcs):
@@ -464,10 +435,7 @@ def isna(self) -> npt.NDArray[np.bool_]:
 
         This should return a 1-D array the same length as 'self'.
         """
-        if pa_version_under2p0:
-            return self._data.is_null().to_pandas().values
-        else:
-            return self._data.is_null().to_numpy()
+        return self._data.is_null().to_numpy()
 
     @deprecate_nonkeyword_arguments(version=None, allowed_args=["self"])
     def argsort(
@@ -492,10 +460,7 @@ def argsort(
         result = pc.array_sort_indices(
             self._data, order=order, null_placement=null_placement
         )
-        if pa_version_under2p0:
-            np_result = result.to_pandas().values
-        else:
-            np_result = result.to_numpy()
+        np_result = result.to_numpy()
         return np_result.astype(np.intp, copy=False)
 
     def _argmin_max(self, skipna: bool, method: str) -> int:
@@ -548,24 +513,11 @@ def dropna(self: ArrowExtensionArrayT) -> ArrowExtensionArrayT:
             return type(self)(pc.drop_null(self._data))
 
     def isin(self, values) -> npt.NDArray[np.bool_]:
-        if pa_version_under2p0:
-            fallback_performancewarning(version="2")
-            return super().isin(values)
-
-        # for an empty value_set pyarrow 3.0.0 segfaults and pyarrow 2.0.0 returns True
-        # for null values, so we short-circuit to return all False array.
+        # short-circuit to return all False array.
         if not len(values):
             return np.zeros(len(self), dtype=bool)
 
-        kwargs = {}
-        if pa_version_under3p0:
-            # in pyarrow 2.0.0 skip_null is ignored but is a required keyword and raises
-            # with unexpected keyword argument in pyarrow 3.0.0+
-            kwargs["skip_null"] = True
-
-        result = pc.is_in(
-            self._data, value_set=pa.array(values, from_pandas=True), **kwargs
-        )
+        result = pc.is_in(self._data, value_set=pa.array(values, from_pandas=True))
         # pyarrow 2.0.0 returned nulls, so we explicitly specify dtype to convert nulls
         # to False
         return np.array(result, dtype=np.bool_)
@@ -584,10 +536,7 @@ def _values_for_factorize(self) -> tuple[np.ndarray, Any]:
         The values returned by this method are also used in
         :func:`pandas.util.hash_pandas_object`.
         """
-        if pa_version_under2p0:
-            values = self._data.to_pandas().values
-        else:
-            values = self._data.to_numpy()
+        values = self._data.to_numpy()
         return values, self.dtype.na_value
 
     @doc(ExtensionArray.factorize)
@@ -597,11 +546,8 @@ def factorize(
         use_na_sentinel: bool | lib.NoDefault = lib.no_default,
     ) -> tuple[np.ndarray, ExtensionArray]:
         resolved_na_sentinel = resolve_na_sentinel(na_sentinel, use_na_sentinel)
-        if pa_version_under4p0:
-            encoded = self._data.dictionary_encode()
-        else:
-            null_encoding = "mask" if resolved_na_sentinel is not None else "encode"
-            encoded = self._data.dictionary_encode(null_encoding=null_encoding)
+        null_encoding = "mask" if resolved_na_sentinel is not None else "encode"
+        encoded = self._data.dictionary_encode(null_encoding=null_encoding)
         indices = pa.chunked_array(
             [c.indices for c in encoded.chunks], type=encoded.type.index_type
         ).to_pandas()
@@ -613,16 +559,6 @@ def factorize(
 
         if encoded.num_chunks:
             uniques = type(self)(encoded.chunk(0).dictionary)
-            if resolved_na_sentinel is None and pa_version_under4p0:
-                # TODO: share logic with BaseMaskedArray.factorize
-                # Insert na with the proper code
-                na_mask = indices.values == -1
-                na_index = na_mask.argmax()
-                if na_mask[na_index]:
-                    na_code = 0 if na_index == 0 else indices[:na_index].max() + 1
-                    uniques = uniques.insert(na_code, self.dtype.na_value)
-                    indices[indices >= na_code] += 1
-                    indices[indices == -1] = na_code
         else:
             uniques = type(self)(pa.array([], type=encoded.type.value_type))
 
@@ -740,11 +676,7 @@ def unique(self: ArrowExtensionArrayT) -> ArrowExtensionArrayT:
         -------
         ArrowExtensionArray
         """
-        if pa_version_under2p0:
-            fallback_performancewarning(version="2")
-            return super().unique()
-        else:
-            return type(self)(pc.unique(self._data))
+        return type(self)(pc.unique(self._data))
 
     def value_counts(self, dropna: bool = True) -> Series:
         """
@@ -957,10 +889,6 @@ def _quantile(
         -------
         same type as self
         """
-        if pa_version_under4p0:
-            raise NotImplementedError(
-                "quantile only supported for pyarrow version >= 4.0"
-            )
         result = pc.quantile(self._data, q=qs, interpolation=interpolation)
         return type(self)(result)
 

pandas/core/arrays/arrow/dtype.py

@@ -5,15 +5,15 @@
 import numpy as np
 
 from pandas._typing import DtypeObj
-from pandas.compat import pa_version_under1p01
+from pandas.compat import pa_version_under5p0
 from pandas.util._decorators import cache_readonly
 
 from pandas.core.dtypes.base import (
     StorageExtensionDtype,
     register_extension_dtype,
 )
 
-if not pa_version_under1p01:
+if not pa_version_under5p0:
     import pyarrow as pa
 
 
@@ -66,8 +66,8 @@ class ArrowDtype(StorageExtensionDtype):
 
     def __init__(self, pyarrow_dtype: pa.DataType) -> None:
         super().__init__("pyarrow")
-        if pa_version_under1p01:
-            raise ImportError("pyarrow>=1.0.1 is required for ArrowDtype")
+        if pa_version_under5p0:
+            raise ImportError("pyarrow>=5.0.0 is required for ArrowDtype")
         if not isinstance(pyarrow_dtype, pa.DataType):
             raise ValueError(
                 f"pyarrow_dtype ({pyarrow_dtype}) must be an instance "