lint: replace isort with Ruff's rule I

.pre-commit-config.yaml

@@ -16,17 +16,6 @@ repos:
             ^cpp/cmake/thirdparty/patches/.*|
             ^python/cudf/cudf/tests/data/subword_tokenizer_data/.*
           )
-  - repo: https://github.com/PyCQA/isort
-    rev: 5.13.2
-    hooks:
-      - id: isort
-        # Use the config file specific to each subproject so that each
-        # project can specify its own first/third-party packages.
-        args: ["--config-root=python/", "--resolve-all-configs"]
-        files: python/.*
-        exclude: |
-          (?x)^(^python/cudf_polars/.*)
-        types_or: [python, cython, pyi]
   - repo: https://github.com/MarcoGorelli/cython-lint
     rev: v0.16.2
     hooks:
@@ -150,6 +139,7 @@ repos:
     rev: v0.4.8
     hooks:
       - id: ruff
+        args: ["--fix"]
         files: python/.*$
       - id: ruff-format
         files: python/.*$

CONTRIBUTING.md

@@ -293,8 +293,8 @@ In order to run doxygen as a linter on C++/CUDA code, run
 ./ci/checks/doxygen.sh
 ```
 
-Python code runs several linters including [Black](https://black.readthedocs.io/en/stable/),
-[isort](https://pycqa.github.io/isort/), and [flake8](https://flake8.pycqa.org/en/latest/).
+Python code runs several linters including [Ruff](https://docs.astral.sh/ruff/)
+with its various rules  for Black-like formatting or Isort.
 
 cuDF also uses [codespell](https://github.com/codespell-project/codespell) to find spelling
 mistakes, and this check is run as a pre-commit hook. To apply the suggested spelling fixes,

docs/cudf/source/developer_guide/contributing_guide.md

@@ -15,8 +15,7 @@ Developers are strongly recommended to set up `pre-commit` prior to any developm
 The `.pre-commit-config.yaml` file at the root of the repo is the primary source of truth linting.
 Specifically, cuDF uses the following tools:
 
-- [`ruff`](https://beta.ruff.rs/) checks for general code formatting compliance.
-- [`isort`](https://pycqa.github.io/isort/) ensures imports are sorted consistently.
+- [`ruff`](https://docs.astral.sh/ruff/) checks for general code formatting compliance.
 - [`mypy`](http://mypy-lang.org/) performs static type checking.
   In conjunction with [type hints](https://docs.python.org/3/library/typing.html),
   `mypy` can help catch various bugs that are otherwise difficult to find.

docs/cudf/source/user_guide/10min.ipynb

@@ -38,10 +38,10 @@
     "import os\n",
     "\n",
     "import cupy as cp\n",
+    "import dask_cudf\n",
     "import pandas as pd\n",
     "\n",
     "import cudf\n",
-    "import dask_cudf\n",
     "\n",
     "cp.random.seed(12)\n",
     "\n",

docs/cudf/source/user_guide/guide-to-udfs.ipynb

@@ -101,6 +101,8 @@
    "outputs": [],
    "source": [
     "# define a scalar function\n",
+    "\n",
+    "\n",
     "def f(x):\n",
     "    return x + 1"
    ]
@@ -247,6 +249,8 @@
    "outputs": [],
    "source": [
     "# redefine the same function from above\n",
+    "\n",
+    "\n",
     "def f(x):\n",
     "    return x + 1"
    ]
@@ -1622,6 +1626,8 @@
    "outputs": [],
    "source": [
     "# a user defined aggregation function.\n",
+    "\n",
+    "\n",
     "def udaf(df):\n",
     "    return df[\"b\"].max() - df[\"b\"].min() / 2"
    ]

pyproject.toml

@@ -34,6 +34,8 @@ select = [
     "F",
     # pycodestyle Warning
     "W",
+    # isort
+    "I",
     # no-blank-line-before-function
     "D201",
     # one-blank-line-after-class

python/cudf/benchmarks/conftest.py

@@ -56,27 +56,23 @@
 # into the main repo.
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "common"))
 
-from config import cudf  # noqa: W0611, E402, F401
-from utils import (  # noqa: E402
-    OrderedSet,
-    collapse_fixtures,
-    column_generators,
-    make_fixture,
-)
-
 # Turn off isort until we upgrade to 5.8.0
 # https://github.com/pycqa/isort/issues/1594
-# isort: off
 from config import (  # noqa: W0611, E402, F401
     NUM_COLS,
     NUM_ROWS,
     collect_ignore,
+    cudf,  # noqa: W0611, E402, F401
     pytest_collection_modifyitems,
     pytest_sessionfinish,
     pytest_sessionstart,
 )
-
-# isort: on
+from utils import (  # noqa: E402
+    OrderedSet,
+    collapse_fixtures,
+    column_generators,
+    make_fixture,
+)
 
 
 @pytest_cases.fixture(params=[0, 1], ids=["AxisIndex", "AxisColumn"])

python/cudf/cudf/_typing.py

@@ -1,8 +1,8 @@
 # Copyright (c) 2021-2024, NVIDIA CORPORATION.
 
 import sys
-from collections.abc import Callable
-from typing import TYPE_CHECKING, Any, Dict, Iterable, TypeVar, Union
+from collections.abc import Callable, Iterable
+from typing import TYPE_CHECKING, Any, TypeVar, Union
 
 import numpy as np
 from pandas import Period, Timedelta, Timestamp
@@ -42,7 +42,7 @@
 SeriesOrSingleColumnIndex = Union["cudf.Series", "cudf.core.index.Index"]
 
 # Groupby aggregation
-AggType = Union[str, Callable]
-MultiColumnAggType = Union[
-    AggType, Iterable[AggType], Dict[Any, Iterable[AggType]]
+AggType = Union[str, Callable]  # noqa: UP007
+MultiColumnAggType = Union[  # noqa: UP007
+    AggType, Iterable[AggType], dict[Any, Iterable[AggType]]
 ]

python/cudf/cudf/core/buffer/buffer.py

@@ -6,7 +6,7 @@
 import pickle
 import weakref
 from types import SimpleNamespace
-from typing import Any, Literal, Mapping
+from typing import TYPE_CHECKING, Any, Literal
 
 import numpy
 from typing_extensions import Self
@@ -18,6 +18,9 @@
 from cudf.core.abc import Serializable
 from cudf.utils.string import format_bytes
 
+if TYPE_CHECKING:
+    from collections.abc import Mapping
+
 
 def host_memory_allocation(nbytes: int) -> memoryview:
     """Allocate host memory using NumPy

python/cudf/cudf/core/buffer/exposure_tracked_buffer.py

@@ -2,13 +2,16 @@
 
 from __future__ import annotations
 
-from typing import Literal, Mapping
+from typing import TYPE_CHECKING, Literal
 
 from typing_extensions import Self
 
 import cudf
 from cudf.core.buffer.buffer import Buffer, BufferOwner
 
+if TYPE_CHECKING:
+    from collections.abc import Mapping
+
 
 class ExposureTrackedBuffer(Buffer):
     """An exposure tracked buffer.

python/cudf/cudf/core/column/__init__.py

@@ -29,4 +29,3 @@
     Decimal128Column,
     DecimalBaseColumn,
 )
-from cudf.core.column.interval import IntervalColumn  # noqa: F401

python/cudf/cudf/core/column/categorical.py

@@ -4,7 +4,7 @@
 
 import warnings
 from functools import cached_property
-from typing import TYPE_CHECKING, Any, Mapping, Sequence, cast
+from typing import TYPE_CHECKING, Any, cast
 
 import numpy as np
 import pandas as pd
@@ -26,6 +26,7 @@
 
 if TYPE_CHECKING:
     from collections import abc
+    from collections.abc import Mapping, Sequence
 
     import numba.cuda
 

python/cudf/cudf/core/column/column.py

@@ -4,10 +4,11 @@
 
 import pickle
 from collections import abc
+from collections.abc import MutableSequence, Sequence
 from functools import cached_property
 from itertools import chain
 from types import SimpleNamespace
-from typing import TYPE_CHECKING, Any, Literal, MutableSequence, Sequence, cast
+from typing import TYPE_CHECKING, Any, Literal, cast
 
 import cupy
 import numpy as np

python/cudf/cudf/core/column/datetime.py

@@ -8,7 +8,7 @@
 import locale
 import re
 from locale import nl_langinfo
-from typing import TYPE_CHECKING, Literal, Sequence, cast
+from typing import TYPE_CHECKING, Literal, cast
 
 import numpy as np
 import pandas as pd
@@ -31,6 +31,8 @@
 from cudf.utils.utils import _all_bools_with_nulls
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     from cudf._typing import (
         ColumnBinaryOperand,
         DatetimeLikeScalar,

python/cudf/cudf/core/column/decimal.py

@@ -3,8 +3,9 @@
 from __future__ import annotations
 
 import warnings
+from collections.abc import Sequence
 from decimal import Decimal
-from typing import TYPE_CHECKING, Sequence, cast
+from typing import TYPE_CHECKING, cast
 
 import cupy as cp
 import numpy as np

python/cudf/cudf/core/column/lists.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 from functools import cached_property
-from typing import TYPE_CHECKING, Sequence, cast
+from typing import TYPE_CHECKING, cast
 
 import numpy as np
 import pandas as pd
@@ -34,6 +34,8 @@
 from cudf.core.missing import NA
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     from cudf._typing import ColumnBinaryOperand, ColumnLike, Dtype, ScalarLike
     from cudf.core.buffer import Buffer
 

python/cudf/cudf/core/column/methods.py

@@ -2,9 +2,7 @@
 
 from __future__ import annotations
 
-from typing import Union, overload
-
-from typing_extensions import Literal
+from typing import Literal, Union, overload
 
 import cudf
 import cudf.core.column

python/cudf/cudf/core/column/numerical.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import functools
-from typing import TYPE_CHECKING, Any, Sequence, cast
+from typing import TYPE_CHECKING, Any, cast
 
 import numpy as np
 import pandas as pd
@@ -28,7 +28,7 @@
 from .numerical_base import NumericalBaseColumn
 
 if TYPE_CHECKING:
-    from collections.abc import Callable
+    from collections.abc import Callable, Sequence
 
     from cudf._typing import (
         ColumnBinaryOperand,

python/cudf/cudf/core/column/string.py

@@ -5,7 +5,7 @@
 import re
 import warnings
 from functools import cached_property
-from typing import TYPE_CHECKING, Sequence, cast, overload
+from typing import TYPE_CHECKING, cast, overload
 
 import numpy as np
 import pandas as pd
@@ -35,6 +35,8 @@ def str_to_boolean(column: StringColumn):
 
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     import cupy
     import numba.cuda
 

python/cudf/cudf/core/column/timedelta.py

@@ -4,7 +4,7 @@
 
 import datetime
 import functools
-from typing import TYPE_CHECKING, Sequence, cast
+from typing import TYPE_CHECKING, cast
 
 import numpy as np
 import pandas as pd
@@ -19,6 +19,8 @@
 from cudf.utils.utils import _all_bools_with_nulls
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     from cudf._typing import ColumnBinaryOperand, DatetimeLikeScalar, Dtype
 
 _unit_to_nanoseconds_conversion = {

python/cudf/cudf/core/column_accessor.py

@@ -5,8 +5,9 @@
 import itertools
 import sys
 from collections import abc
+from collections.abc import Mapping
 from functools import cached_property, reduce
-from typing import TYPE_CHECKING, Any, Mapping, cast
+from typing import TYPE_CHECKING, Any, cast
 
 import numpy as np
 import pandas as pd

python/cudf/cudf/core/dataframe.py

@@ -13,8 +13,8 @@
 import textwrap
 import warnings
 from collections import abc, defaultdict
-from collections.abc import Callable, Iterator
-from typing import TYPE_CHECKING, Any, Literal, MutableMapping, cast
+from collections.abc import Callable, Iterator, MutableMapping
+from typing import TYPE_CHECKING, Any, Literal, cast
 
 import cupy
 import numba

python/cudf/cudf/core/df_protocol.py

@@ -3,7 +3,7 @@
 
 import enum
 from collections import abc
-from typing import Any, Iterable, Mapping, Sequence, Tuple, cast
+from typing import TYPE_CHECKING, Any, cast
 
 import cupy as cp
 import numpy as np
@@ -20,6 +20,9 @@
     build_column,
 )
 
+if TYPE_CHECKING:
+    from collections.abc import Iterable, Mapping, Sequence
+
 # Implementation of interchange protocol classes
 # ----------------------------------------------
 
@@ -61,7 +64,7 @@ class _MaskKind(enum.IntEnum):
     _DtypeKind.BOOL,
     _DtypeKind.STRING,
 }
-ProtoDtype = Tuple[_DtypeKind, int, str, str]
+ProtoDtype = tuple[_DtypeKind, int, str, str]
 
 
 class _CuDFBuffer: