CI: unpin isort 5 (#35134)

asv_bench/benchmarks/frame_ctor.py

@@ -6,7 +6,7 @@
 from .pandas_vb_common import tm
 
 try:
-    from pandas.tseries.offsets import Nano, Hour
+    from pandas.tseries.offsets import Hour, Nano
 except ImportError:
     # For compatibility with older versions
     from pandas.core.datetools import *  # noqa

asv_bench/benchmarks/gil.py

@@ -7,14 +7,14 @@
 
 try:
     from pandas import (
-        rolling_median,
+        rolling_kurt,
+        rolling_max,
         rolling_mean,
+        rolling_median,
         rolling_min,
-        rolling_max,
-        rolling_var,
         rolling_skew,
-        rolling_kurt,
         rolling_std,
+        rolling_var,
     )
 
     have_rolling_methods = True

asv_bench/benchmarks/io/parsers.py

@@ -2,8 +2,8 @@
 
 try:
     from pandas._libs.tslibs.parsing import (
-        concat_date_cols,
         _does_string_look_like_datetime,
+        concat_date_cols,
     )
 except ImportError:
     # Avoid whole benchmark suite import failure on asv (currently 0.4)

asv_bench/benchmarks/tslibs/normalize.py

@@ -1,5 +1,5 @@
 try:
-    from pandas._libs.tslibs import normalize_i8_timestamps, is_date_array_normalized
+    from pandas._libs.tslibs import is_date_array_normalized, normalize_i8_timestamps
 except ImportError:
     from pandas._libs.tslibs.conversion import (
         normalize_i8_timestamps,

ci/code_checks.sh

@@ -121,7 +121,7 @@ if [[ -z "$CHECK" || "$CHECK" == "lint" ]]; then
 
     # Imports - Check formatting using isort see setup.cfg for settings
     MSG='Check import format using isort' ; echo $MSG
-    ISORT_CMD="isort --quiet --recursive --check-only pandas asv_bench scripts"
+    ISORT_CMD="isort --quiet --check-only pandas asv_bench scripts"
     if [[ "$GITHUB_ACTIONS" == "true" ]]; then
         eval $ISORT_CMD | awk '{print "##[error]" $0}'; RET=$(($RET + ${PIPESTATUS[0]}))
     else

doc/source/development/contributing.rst

@@ -751,7 +751,7 @@ Imports are alphabetically sorted within these sections.
 
 As part of :ref:`Continuous Integration <contributing.ci>` checks we run::
 
-    isort --recursive --check-only pandas
+    isort --check-only pandas
 
 to check that imports are correctly formatted as per the `setup.cfg`.
 
@@ -770,8 +770,6 @@ You should run::
 
 to automatically format imports correctly. This will modify your local copy of the files.
 
-The `--recursive` flag can be passed to sort all files in a directory.
-
 Alternatively, you can run a command similar to what was suggested for ``black`` and ``flake8`` :ref:`right above <contributing.code-formatting>`::
 
     git diff upstream/master --name-only -- "*.py" | xargs -r isort

environment.yml

@@ -21,7 +21,7 @@ dependencies:
   - flake8<3.8.0  # temporary pin, GH#34150
   - flake8-comprehensions>=3.1.0  # used by flake8, linting of unnecessary comprehensions
   - flake8-rst>=0.6.0,<=0.7.0  # linting of code blocks in rst files
-  - isort=4.3.21  # check that imports are in the right order
+  - isort>=5.2.1  # check that imports are in the right order
   - mypy=0.730
   - pycodestyle  # used by flake8
 

pandas/_config/config.py

@@ -442,8 +442,8 @@ def register_option(
     ValueError if `validator` is specified and `defval` is not a valid value.
 
     """
-    import tokenize
     import keyword
+    import tokenize
 
     key = key.lower()
 
@@ -660,8 +660,8 @@ def _build_option_description(k: str) -> str:
 
 def pp_options_list(keys: Iterable[str], width=80, _print: bool = False):
     """ Builds a concise listing of available options, grouped by prefix """
-    from textwrap import wrap
     from itertools import groupby
+    from textwrap import wrap
 
     def pp(name: str, ks: Iterable[str]) -> List[str]:
         pfx = "- " + name + ".[" if name else ""

pandas/_libs/algos.pyx

@@ -1,11 +1,12 @@
 import cython
 from cython import Py_ssize_t
 
-from libc.stdlib cimport malloc, free
-from libc.string cimport memmove
 from libc.math cimport fabs, sqrt
+from libc.stdlib cimport free, malloc
+from libc.string cimport memmove
 
 import numpy as np
+
 cimport numpy as cnp
 from numpy cimport (
     NPY_FLOAT32,
@@ -31,12 +32,11 @@ from numpy cimport (
     uint32_t,
     uint64_t,
 )
+
 cnp.import_array()
 
 
 cimport pandas._libs.util as util
-from pandas._libs.util cimport numeric, get_nat
-
 from pandas._libs.khash cimport (
     kh_destroy_int64,
     kh_get_int64,
@@ -46,7 +46,7 @@ from pandas._libs.khash cimport (
     kh_resize_int64,
     khiter_t,
 )
-
+from pandas._libs.util cimport get_nat, numeric
 
 import pandas._libs.missing as missing
 

pandas/_libs/groupby.pyx

@@ -1,27 +1,51 @@
 import cython
 from cython import Py_ssize_t
-from cython cimport floating
 
-from libc.stdlib cimport malloc, free
+from cython cimport floating
+from libc.stdlib cimport free, malloc
 
 import numpy as np
+
 cimport numpy as cnp
-from numpy cimport (ndarray,
-                    int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t,
-                    uint32_t, uint64_t, float32_t, float64_t, complex64_t, complex128_t)
+from numpy cimport (
+    complex64_t,
+    complex128_t,
+    float32_t,
+    float64_t,
+    int8_t,
+    int16_t,
+    int32_t,
+    int64_t,
+    ndarray,
+    uint8_t,
+    uint16_t,
+    uint32_t,
+    uint64_t,
+)
 from numpy.math cimport NAN
-cnp.import_array()
 
-from pandas._libs.util cimport numeric, get_nat
+cnp.import_array()
 
-from pandas._libs.algos cimport (swap, TiebreakEnumType, TIEBREAK_AVERAGE,
-                                 TIEBREAK_MIN, TIEBREAK_MAX, TIEBREAK_FIRST,
-                                 TIEBREAK_DENSE)
-from pandas._libs.algos import (take_2d_axis1_float64_float64,
-                                groupsort_indexer, tiebreakers)
+from pandas._libs.algos cimport (
+    TIEBREAK_AVERAGE,
+    TIEBREAK_DENSE,
+    TIEBREAK_FIRST,
+    TIEBREAK_MAX,
+    TIEBREAK_MIN,
+    TiebreakEnumType,
+    swap,
+)
+from pandas._libs.util cimport get_nat, numeric
+
+from pandas._libs.algos import (
+    groupsort_indexer,
+    take_2d_axis1_float64_float64,
+    tiebreakers,
+)
 
 from pandas._libs.missing cimport checknull
 
+
 cdef int64_t NPY_NAT = get_nat()
 _int64_max = np.iinfo(np.int64).max
 

pandas/_libs/hashing.pyx

@@ -2,10 +2,13 @@
 # at https://github.com/veorq/SipHash
 
 import cython
-from libc.stdlib cimport malloc, free
+
+from libc.stdlib cimport free, malloc
 
 import numpy as np
-from numpy cimport ndarray, uint8_t, uint32_t, uint64_t, import_array
+
+from numpy cimport import_array, ndarray, uint8_t, uint32_t, uint64_t
+
 import_array()
 
 from pandas._libs.util cimport is_nan

pandas/_libs/hashtable.pyx

@@ -1,60 +1,57 @@
 cimport cython
-
-from cpython.ref cimport PyObject, Py_INCREF
-from cpython.mem cimport PyMem_Malloc, PyMem_Free
-
-from libc.stdlib cimport malloc, free
+from cpython.mem cimport PyMem_Free, PyMem_Malloc
+from cpython.ref cimport Py_INCREF, PyObject
+from libc.stdlib cimport free, malloc
 
 import numpy as np
+
 cimport numpy as cnp
-from numpy cimport ndarray, uint8_t, uint32_t, float64_t
+from numpy cimport float64_t, ndarray, uint8_t, uint32_t
 from numpy.math cimport NAN
+
 cnp.import_array()
 
 
+from pandas._libs cimport util
 from pandas._libs.khash cimport (
-    khiter_t,
-    kh_str_t,
-    kh_init_str,
-    kh_put_str,
-    kh_exist_str,
-    kh_get_str,
-    kh_destroy_str,
-    kh_resize_str,
-    kh_put_strbox,
-    kh_get_strbox,
-    kh_init_strbox,
-    kh_int64_t,
-    kh_init_int64,
-    kh_resize_int64,
+    kh_destroy_float64,
     kh_destroy_int64,
-    kh_get_int64,
+    kh_destroy_pymap,
+    kh_destroy_str,
+    kh_destroy_uint64,
+    kh_exist_float64,
     kh_exist_int64,
-    kh_put_int64,
+    kh_exist_pymap,
+    kh_exist_str,
+    kh_exist_uint64,
     kh_float64_t,
-    kh_exist_float64,
-    kh_put_float64,
-    kh_init_float64,
     kh_get_float64,
-    kh_destroy_float64,
-    kh_resize_float64,
-    kh_resize_uint64,
-    kh_exist_uint64,
-    kh_destroy_uint64,
-    kh_put_uint64,
+    kh_get_int64,
+    kh_get_pymap,
+    kh_get_str,
+    kh_get_strbox,
     kh_get_uint64,
-    kh_init_uint64,
-    kh_destroy_pymap,
-    kh_exist_pymap,
+    kh_init_float64,
+    kh_init_int64,
     kh_init_pymap,
-    kh_get_pymap,
+    kh_init_str,
+    kh_init_strbox,
+    kh_init_uint64,
+    kh_int64_t,
+    kh_put_float64,
+    kh_put_int64,
     kh_put_pymap,
+    kh_put_str,
+    kh_put_strbox,
+    kh_put_uint64,
+    kh_resize_float64,
+    kh_resize_int64,
     kh_resize_pymap,
+    kh_resize_str,
+    kh_resize_uint64,
+    kh_str_t,
+    khiter_t,
 )
-
-
-from pandas._libs cimport util
-
 from pandas._libs.missing cimport checknull
 
 

pandas/_libs/index.pyx

@@ -1,6 +1,7 @@
 import warnings
 
 import numpy as np
+
 cimport numpy as cnp
 from numpy cimport (
     float32_t,
@@ -16,17 +17,16 @@ from numpy cimport (
     uint32_t,
     uint64_t,
 )
+
 cnp.import_array()
 
 
 from pandas._libs cimport util
-
+from pandas._libs.hashtable cimport HashTable
 from pandas._libs.tslibs.nattype cimport c_NaT as NaT
 from pandas._libs.tslibs.period cimport is_period_object
-from pandas._libs.tslibs.timestamps cimport _Timestamp
 from pandas._libs.tslibs.timedeltas cimport _Timedelta
-
-from pandas._libs.hashtable cimport HashTable
+from pandas._libs.tslibs.timestamps cimport _Timestamp
 
 from pandas._libs import algos, hashtable as _hash
 from pandas._libs.missing import checknull

pandas/_libs/internals.pyx

@@ -5,12 +5,15 @@ from cython import Py_ssize_t
 
 from cpython.slice cimport PySlice_GetIndicesEx
 
+
 cdef extern from "Python.h":
     Py_ssize_t PY_SSIZE_T_MAX
 
 import numpy as np
+
 cimport numpy as cnp
 from numpy cimport NPY_INT64, int64_t
+
 cnp.import_array()
 
 from pandas._libs.algos import ensure_int64