Reformat codebase with isort

action/main.py

@@ -2,7 +2,7 @@
 import shlex
 import sys
 from pathlib import Path
-from subprocess import run, PIPE, STDOUT
+from subprocess import PIPE, STDOUT, run
 
 ACTION_PATH = Path(os.environ["GITHUB_ACTION_PATH"])
 ENV_PATH = ACTION_PATH / ".black-env"

fuzz.py

@@ -8,7 +8,8 @@
 import re
 
 import hypothesmith
-from hypothesis import HealthCheck, given, settings, strategies as st
+from hypothesis import HealthCheck, given, settings
+from hypothesis import strategies as st
 
 import black
 from blib2to3.pgen2.tokenize import TokenError
@@ -78,6 +79,7 @@ def test_idempotent_any_syntatically_valid_python(
     # (if you want only bounded fuzzing, just use `pytest fuzz.py`)
     try:
         import sys
+
         import atheris
     except ImportError:
         pass

gallery/gallery.py

@@ -10,15 +10,7 @@
 from concurrent.futures import ThreadPoolExecutor
 from functools import lru_cache, partial
 from pathlib import Path
-from typing import (
-    Generator,
-    List,
-    NamedTuple,
-    Optional,
-    Tuple,
-    Union,
-    cast,
-)
+from typing import Generator, List, NamedTuple, Optional, Tuple, Union, cast
 from urllib.request import urlopen, urlretrieve
 
 PYPI_INSTANCE = "https://pypi.org/pypi"

scripts/migrate-black.py

@@ -5,7 +5,7 @@
 import logging
 import os
 import sys
-from subprocess import check_output, run, Popen, PIPE
+from subprocess import PIPE, Popen, check_output, run
 
 
 def git(*args: str) -> str:

setup.py

@@ -1,7 +1,8 @@
 # Copyright (C) 2020 Łukasz Langa
-from setuptools import setup, find_packages
-import sys
 import os
+import sys
+
+from setuptools import find_packages, setup
 
 assert sys.version_info >= (3, 6, 2), "black requires Python 3.6.2+"
 from pathlib import Path  # noqa E402

src/black/__init__.py

@@ -1,20 +1,20 @@
 import asyncio
-from json.decoder import JSONDecodeError
-import json
-from contextlib import contextmanager
-from datetime import datetime
-from enum import Enum
 import io
-from multiprocessing import Manager, freeze_support
+import json
 import os
-from pathlib import Path
-from pathspec.patterns.gitwildmatch import GitWildMatchPatternError
 import platform
 import re
 import signal
 import sys
 import tokenize
 import traceback
+from contextlib import contextmanager
+from dataclasses import replace
+from datetime import datetime
+from enum import Enum
+from json.decoder import JSONDecodeError
+from multiprocessing import Manager, freeze_support
+from pathlib import Path
 from typing import (
     TYPE_CHECKING,
     Any,
@@ -34,48 +34,61 @@
 
 import click
 from click.core import ParameterSource
-from dataclasses import replace
 from mypy_extensions import mypyc_attr
+from pathspec.patterns.gitwildmatch import GitWildMatchPatternError
 
-from black.const import DEFAULT_LINE_LENGTH, DEFAULT_INCLUDES, DEFAULT_EXCLUDES
-from black.const import STDIN_PLACEHOLDER
-from black.nodes import STARS, syms, is_simple_decorator_expression
-from black.nodes import is_string_token, is_number_token
-from black.lines import Line, EmptyLineTracker
-from black.linegen import transform_line, LineGenerator, LN
+from _black_version import version as __version__
+from black.cache import Cache, filter_cached, get_cache_info, read_cache, write_cache
 from black.comments import normalize_fmt_off
-from black.mode import FUTURE_FLAG_TO_FEATURE, Mode, TargetVersion
-from black.mode import Feature, supports_feature, VERSION_TO_FEATURES
-from black.cache import read_cache, write_cache, get_cache_info, filter_cached, Cache
-from black.concurrency import cancel, shutdown, maybe_install_uvloop
-from black.output import dump_to_file, ipynb_diff, diff, color_diff, out, err
-from black.report import Report, Changed, NothingChanged
+from black.concurrency import cancel, maybe_install_uvloop, shutdown
+from black.const import (
+    DEFAULT_EXCLUDES,
+    DEFAULT_INCLUDES,
+    DEFAULT_LINE_LENGTH,
+    STDIN_PLACEHOLDER,
+)
 from black.files import (
     find_project_root,
     find_pyproject_toml,
-    parse_pyproject_toml,
     find_user_pyproject_toml,
+    gen_python_files,
+    get_gitignore,
+    normalize_path_maybe_ignore,
+    parse_pyproject_toml,
+    wrap_stream_for_windows,
 )
-from black.files import gen_python_files, get_gitignore, normalize_path_maybe_ignore
-from black.files import wrap_stream_for_windows
+from black.handle_ipynb_magics import (
+    PYTHON_CELL_MAGICS,
+    TRANSFORMED_MAGICS,
+    jupyter_dependencies_are_installed,
+    mask_cell,
+    put_trailing_semicolon_back,
+    remove_trailing_semicolon,
+    unmask_cell,
+)
+from black.linegen import LN, LineGenerator, transform_line
+from black.lines import EmptyLineTracker, Line
+from black.mode import (
+    FUTURE_FLAG_TO_FEATURE,
+    VERSION_TO_FEATURES,
+    Feature,
+    Mode,
+    TargetVersion,
+    supports_feature,
+)
+from black.nodes import (
+    STARS,
+    is_number_token,
+    is_simple_decorator_expression,
+    is_string_token,
+    syms,
+)
+from black.output import color_diff, diff, dump_to_file, err, ipynb_diff, out
 from black.parsing import InvalidInput  # noqa F401
 from black.parsing import lib2to3_parse, parse_ast, stringify_ast
-from black.handle_ipynb_magics import (
-    mask_cell,
-    unmask_cell,
-    remove_trailing_semicolon,
-    put_trailing_semicolon_back,
-    TRANSFORMED_MAGICS,
-    PYTHON_CELL_MAGICS,
-    jupyter_dependencies_are_installed,
-)
-
-
-# lib2to3 fork
-from blib2to3.pytree import Node, Leaf
+from black.report import Changed, NothingChanged, Report
 from blib2to3.pgen2 import token
-
-from _black_version import version as __version__
+from blib2to3.pytree import Leaf, Node
 
 if TYPE_CHECKING:
     from concurrent.futures import Executor
@@ -770,7 +783,7 @@ def reformat_many(
     workers: Optional[int],
 ) -> None:
     """Reformat multiple files using a ProcessPoolExecutor."""
-    from concurrent.futures import Executor, ThreadPoolExecutor, ProcessPoolExecutor
+    from concurrent.futures import Executor, ProcessPoolExecutor, ThreadPoolExecutor
 
     executor: Executor
     worker_count = workers if workers is not None else DEFAULT_WORKERS

src/black/brackets.py

@@ -1,7 +1,7 @@
 """Builds on top of nodes.py to track brackets."""
 
-from dataclasses import dataclass, field
 import sys
+from dataclasses import dataclass, field
 from typing import Dict, Iterable, List, Optional, Tuple, Union
 
 if sys.version_info < (3, 8):
@@ -9,12 +9,20 @@
 else:
     from typing import Final
 
-from blib2to3.pytree import Leaf, Node
+from black.nodes import (
+    BRACKET,
+    CLOSING_BRACKETS,
+    COMPARATORS,
+    LOGIC_OPERATORS,
+    MATH_OPERATORS,
+    OPENING_BRACKETS,
+    UNPACKING_PARENTS,
+    VARARGS_PARENTS,
+    is_vararg,
+    syms,
+)
 from blib2to3.pgen2 import token
-
-from black.nodes import syms, is_vararg, VARARGS_PARENTS, UNPACKING_PARENTS
-from black.nodes import BRACKET, OPENING_BRACKETS, CLOSING_BRACKETS
-from black.nodes import MATH_OPERATORS, COMPARATORS, LOGIC_OPERATORS
+from blib2to3.pytree import Leaf, Node
 
 # types
 LN = Union[Leaf, Node]

src/black/cache.py

@@ -2,16 +2,14 @@
 
 import os
 import pickle
-from pathlib import Path
 import tempfile
+from pathlib import Path
 from typing import Dict, Iterable, Set, Tuple
 
 from platformdirs import user_cache_dir
 
-from black.mode import Mode
-
 from _black_version import version as __version__
-
+from black.mode import Mode
 
 # types
 Timestamp = float

src/black/comments.py

@@ -1,7 +1,7 @@
+import re
 import sys
 from dataclasses import dataclass
 from functools import lru_cache
-import re
 from typing import Iterator, List, Optional, Union
 
 if sys.version_info >= (3, 8):
@@ -9,11 +9,16 @@
 else:
     from typing_extensions import Final
 
-from blib2to3.pytree import Node, Leaf, type_repr
+from black.nodes import (
+    CLOSING_BRACKETS,
+    STANDALONE_COMMENT,
+    WHITESPACE,
+    container_of,
+    first_leaf_column,
+    preceding_leaf,
+)
 from blib2to3.pgen2 import token
-
-from black.nodes import first_leaf_column, preceding_leaf, container_of
-from black.nodes import CLOSING_BRACKETS, STANDALONE_COMMENT, WHITESPACE
+from blib2to3.pytree import Leaf, Node, type_repr
 
 # types
 LN = Union[Leaf, Node]

src/black/debug.py

@@ -1,12 +1,11 @@
 from dataclasses import dataclass
 from typing import Iterator, TypeVar, Union
 
-from blib2to3.pytree import Node, Leaf, type_repr
-from blib2to3.pgen2 import token
-
 from black.nodes import Visitor
 from black.output import out
 from black.parsing import lib2to3_parse
+from blib2to3.pgen2 import token
+from blib2to3.pytree import Leaf, Node, type_repr
 
 LN = Union[Leaf, Node]
 T = TypeVar("T")

src/black/files.py

@@ -1,9 +1,10 @@
-from functools import lru_cache
 import io
 import os
-from pathlib import Path
 import sys
+from functools import lru_cache
+from pathlib import Path
 from typing import (
+    TYPE_CHECKING,
     Any,
     Dict,
     Iterable,
@@ -14,7 +15,6 @@
     Sequence,
     Tuple,
     Union,
-    TYPE_CHECKING,
 )
 
 from mypy_extensions import mypyc_attr
@@ -30,9 +30,9 @@
 else:
     import tomli as tomllib
 
+from black.handle_ipynb_magics import jupyter_dependencies_are_installed
 from black.output import err
 from black.report import Report
-from black.handle_ipynb_magics import jupyter_dependencies_are_installed
 
 if TYPE_CHECKING:
     import colorama  # noqa: F401

src/black/handle_ipynb_magics.py

@@ -1,22 +1,20 @@
 """Functions to process IPython magics with."""
 
-from functools import lru_cache
-import dataclasses
 import ast
-from typing import Dict, List, Tuple, Optional
-
+import collections
+import dataclasses
 import secrets
 import sys
-import collections
+from functools import lru_cache
+from typing import Dict, List, Optional, Tuple
 
 if sys.version_info >= (3, 10):
     from typing import TypeGuard
 else:
     from typing_extensions import TypeGuard
 
-from black.report import NothingChanged
 from black.output import out
-
+from black.report import NothingChanged
 
 TRANSFORMED_MAGICS = frozenset(
     (
@@ -90,11 +88,7 @@ def remove_trailing_semicolon(src: str) -> Tuple[str, bool]:
     Mirrors the logic in `quiet` from `IPython.core.displayhook`, but uses
     ``tokenize_rt`` so that round-tripping works fine.
     """
-    from tokenize_rt import (
-        src_to_tokens,
-        tokens_to_src,
-        reversed_enumerate,
-    )
+    from tokenize_rt import reversed_enumerate, src_to_tokens, tokens_to_src
 
     tokens = src_to_tokens(src)
     trailing_semicolon = False
@@ -118,7 +112,7 @@ def put_trailing_semicolon_back(src: str, has_trailing_semicolon: bool) -> str:
     """
     if not has_trailing_semicolon:
         return src
-    from tokenize_rt import src_to_tokens, tokens_to_src, reversed_enumerate
+    from tokenize_rt import reversed_enumerate, src_to_tokens, tokens_to_src
 
     tokens = src_to_tokens(src)
     for idx, token in reversed_enumerate(tokens):

src/black/linegen.py

@@ -1,38 +1,67 @@
 """
 Generating lines of code.
 """
-from functools import partial, wraps
 import sys
+from functools import partial, wraps
 from typing import Collection, Iterator, List, Optional, Set, Union, cast
 
-from black.nodes import WHITESPACE, RARROW, STATEMENT, STANDALONE_COMMENT
-from black.nodes import ASSIGNMENTS, OPENING_BRACKETS, CLOSING_BRACKETS
-from black.nodes import Visitor, syms, is_arith_like, ensure_visible
+from black.brackets import COMMA_PRIORITY, DOT_PRIORITY, max_delimiter_priority_in_atom
+from black.comments import FMT_OFF, generate_comments, list_comments
+from black.lines import (
+    Line,
+    append_leaves,
+    can_be_split,
+    can_omit_invisible_parens,
+    is_line_short_enough,
+    line_to_string,
+)
+from black.mode import Feature, Mode, Preview
 from black.nodes import (
+    ASSIGNMENTS,
+    CLOSING_BRACKETS,
+    OPENING_BRACKETS,
+    RARROW,
+    STANDALONE_COMMENT,
+    STATEMENT,
+    WHITESPACE,
+    Visitor,
+    ensure_visible,
+    is_arith_like,
+    is_atom_with_invisible_parens,
     is_docstring,
     is_empty_tuple,
-    is_one_tuple,
+    is_lpar_token,
+    is_multiline_string,
+    is_name_token,
     is_one_sequence_between,
+    is_one_tuple,
+    is_rpar_token,
+    is_stub_body,
+    is_stub_suite,
+    is_vararg,
+    is_walrus_assignment,
+    is_yield,
+    syms,
+    wrap_in_parentheses,
 )
-from black.nodes import is_name_token, is_lpar_token, is_rpar_token
-from black.nodes import is_walrus_assignment, is_yield, is_vararg, is_multiline_string
-from black.nodes import is_stub_suite, is_stub_body, is_atom_with_invisible_parens
-from black.nodes import wrap_in_parentheses
-from black.brackets import max_delimiter_priority_in_atom
-from black.brackets import DOT_PRIORITY, COMMA_PRIORITY
-from black.lines import Line, line_to_string, is_line_short_enough
-from black.lines import can_omit_invisible_parens, can_be_split, append_leaves
-from black.comments import generate_comments, list_comments, FMT_OFF
 from black.numerics import normalize_numeric_literal
-from black.strings import get_string_prefix, fix_docstring
-from black.strings import normalize_string_prefix, normalize_string_quotes
-from black.trans import Transformer, CannotTransform, StringMerger, StringSplitter
-from black.trans import StringParenWrapper, StringParenStripper, hug_power_op
-from black.mode import Mode, Feature, Preview
-
-from blib2to3.pytree import Node, Leaf
+from black.strings import (
+    fix_docstring,
+    get_string_prefix,
+    normalize_string_prefix,
+    normalize_string_quotes,
+)
+from black.trans import (
+    CannotTransform,
+    StringMerger,
+    StringParenStripper,
+    StringParenWrapper,
+    StringSplitter,
+    Transformer,
+    hug_power_op,
+)
 from blib2to3.pgen2 import token
-
+from blib2to3.pytree import Leaf, Node
 
 # types
 LeafID = int

src/black/lines.py

@@ -1,6 +1,6 @@
-from dataclasses import dataclass, field
 import itertools
 import sys
+from dataclasses import dataclass, field
 from typing import (
     Callable,
     Dict,
@@ -13,16 +13,25 @@
     cast,
 )
 
-from blib2to3.pytree import Node, Leaf
-from blib2to3.pgen2 import token
-
-from black.brackets import BracketTracker, DOT_PRIORITY
+from black.brackets import DOT_PRIORITY, BracketTracker
 from black.mode import Mode, Preview
-from black.nodes import STANDALONE_COMMENT, TEST_DESCENDANTS
-from black.nodes import BRACKETS, OPENING_BRACKETS, CLOSING_BRACKETS
-from black.nodes import syms, whitespace, replace_child, child_towards
-from black.nodes import is_multiline_string, is_import, is_type_comment
-from black.nodes import is_one_sequence_between
+from black.nodes import (
+    BRACKETS,
+    CLOSING_BRACKETS,
+    OPENING_BRACKETS,
+    STANDALONE_COMMENT,
+    TEST_DESCENDANTS,
+    child_towards,
+    is_import,
+    is_multiline_string,
+    is_one_sequence_between,
+    is_type_comment,
+    replace_child,
+    syms,
+    whitespace,
+)
+from blib2to3.pgen2 import token
+from blib2to3.pytree import Leaf, Node
 
 # types
 T = TypeVar("T")

src/black/mode.py

@@ -4,11 +4,10 @@
 chosen by the user.
 """
 
-from hashlib import sha256
 import sys
-
 from dataclasses import dataclass, field
 from enum import Enum, auto
+from hashlib import sha256
 from operator import attrgetter
 from typing import Dict, Set
 from warnings import warn

src/black/nodes.py

@@ -3,16 +3,7 @@
 """
 
 import sys
-from typing import (
-    Generic,
-    Iterator,
-    List,
-    Optional,
-    Set,
-    Tuple,
-    TypeVar,
-    Union,
-)
+from typing import Generic, Iterator, List, Optional, Set, Tuple, TypeVar, Union
 
 if sys.version_info >= (3, 8):
     from typing import Final
@@ -25,14 +16,11 @@
 
 from mypy_extensions import mypyc_attr
 
-# lib2to3 fork
-from blib2to3.pytree import Node, Leaf, type_repr, NL
-from blib2to3 import pygram
-from blib2to3.pgen2 import token
-
 from black.cache import CACHE_DIR
 from black.strings import has_triple_quotes
-
+from blib2to3 import pygram
+from blib2to3.pgen2 import token
+from blib2to3.pytree import NL, Leaf, Node, type_repr
 
 pygram.initialize(CACHE_DIR)
 syms: Final = pygram.python_symbols

src/black/output.py

@@ -4,11 +4,11 @@
 """
 
 import json
-from typing import Any, Optional
-from mypy_extensions import mypyc_attr
 import tempfile
+from typing import Any, Optional
 
 from click import echo, style
+from mypy_extensions import mypyc_attr
 
 
 @mypyc_attr(patchable=True)

src/black/parsing.py

@@ -11,16 +11,14 @@
 else:
     from typing import Final
 
-# lib2to3 fork
-from blib2to3.pytree import Node, Leaf
+from black.mode import Feature, TargetVersion, supports_feature
+from black.nodes import syms
 from blib2to3 import pygram
 from blib2to3.pgen2 import driver
 from blib2to3.pgen2.grammar import Grammar
 from blib2to3.pgen2.parse import ParseError
 from blib2to3.pgen2.tokenize import TokenError
-
-from black.mode import TargetVersion, Feature, supports_feature
-from black.nodes import syms
+from blib2to3.pytree import Leaf, Node
 
 ast3: Any
 

src/black/report.py

@@ -7,7 +7,7 @@
 
 from click import style
 
-from black.output import out, err
+from black.output import err, out
 
 
 class Changed(Enum):

src/black/rusty.py

@@ -4,7 +4,6 @@
 """
 from typing import Generic, TypeVar, Union
 
-
 T = TypeVar("T")
 E = TypeVar("E", bound=Exception)
 

src/black/trans.py

@@ -1,10 +1,11 @@
 """
 String transformers that can split and merge strings.
 """
+import re
+import sys
 from abc import ABC, abstractmethod
 from collections import defaultdict
 from dataclasses import dataclass
-import re
 from typing import (
     Any,
     Callable,
@@ -21,29 +22,38 @@
     TypeVar,
     Union,
 )
-import sys
 
 if sys.version_info < (3, 8):
-    from typing_extensions import Literal, Final
+    from typing_extensions import Final, Literal
 else:
     from typing import Literal, Final
 
 from mypy_extensions import trait
 
-from black.rusty import Result, Ok, Err
-
-from black.mode import Feature
-from black.nodes import syms, replace_child, parent_type
-from black.nodes import is_empty_par, is_empty_lpar, is_empty_rpar
-from black.nodes import OPENING_BRACKETS, CLOSING_BRACKETS, STANDALONE_COMMENT
-from black.lines import Line, append_leaves
 from black.brackets import BracketMatchError
 from black.comments import contains_pragma_comment
-from black.strings import has_triple_quotes, get_string_prefix, assert_is_leaf_string
-from black.strings import normalize_string_quotes
-
-from blib2to3.pytree import Leaf, Node
+from black.lines import Line, append_leaves
+from black.mode import Feature
+from black.nodes import (
+    CLOSING_BRACKETS,
+    OPENING_BRACKETS,
+    STANDALONE_COMMENT,
+    is_empty_lpar,
+    is_empty_par,
+    is_empty_rpar,
+    parent_type,
+    replace_child,
+    syms,
+)
+from black.rusty import Err, Ok, Result
+from black.strings import (
+    assert_is_leaf_string,
+    get_string_prefix,
+    has_triple_quotes,
+    normalize_string_quotes,
+)
 from blib2to3.pgen2 import token
+from blib2to3.pytree import Leaf, Node
 
 
 class CannotTransform(Exception):

src/blackd/__init__.py

@@ -8,6 +8,7 @@
 
 try:
     from aiohttp import web
+
     from .middlewares import cors
 except ImportError as ie:
     raise ImportError(
@@ -16,11 +17,11 @@
         + "to obtain aiohttp_cors: `pip install black[d]`"
     ) from None
 
-import black
-from black.concurrency import maybe_install_uvloop
 import click
 
+import black
 from _black_version import version as __version__
+from black.concurrency import maybe_install_uvloop
 
 # This is used internally by tests to shut down the server prematurely
 _stop_signal = asyncio.Event()

src/blackd/middlewares.py

@@ -1,7 +1,8 @@
-from typing import Iterable, Awaitable, Callable
-from aiohttp.web_response import StreamResponse
-from aiohttp.web_request import Request
+from typing import Awaitable, Callable, Iterable
+
 from aiohttp.web_middlewares import middleware
+from aiohttp.web_request import Request
+from aiohttp.web_response import StreamResponse
 
 Handler = Callable[[Request], Awaitable[StreamResponse]]
 Middleware = Callable[[Request, Handler], Awaitable[StreamResponse]]

tests/optional.py

@@ -14,11 +14,11 @@
 Adapted from https://pypi.org/project/pytest-optional-tests/, (c) 2019 Reece Hart
 """
 
-from functools import lru_cache
 import itertools
 import logging
 import re
-from typing import FrozenSet, List, Set, TYPE_CHECKING
+from functools import lru_cache
+from typing import TYPE_CHECKING, FrozenSet, List, Set
 
 import pytest
 
@@ -32,8 +32,8 @@
 
 
 if TYPE_CHECKING:
-    from _pytest.config.argparsing import Parser
     from _pytest.config import Config
+    from _pytest.config.argparsing import Parser
     from _pytest.mark.structures import MarkDecorator
     from _pytest.nodes import Node
 

tests/test_black.py

@@ -6,6 +6,7 @@
 import logging
 import multiprocessing
 import os
+import re
 import sys
 import types
 import unittest
@@ -31,7 +32,6 @@
 
 import click
 import pytest
-import re
 from click import unstyle
 from click.testing import CliRunner
 from pathspec import PathSpec
@@ -59,8 +59,8 @@
     dump_to_stderr,
     ff,
     fs,
-    read_data,
     get_case_path,
+    read_data,
     read_data_from_file,
 )
 

tests/test_blackd.py

@@ -2,15 +2,16 @@
 from typing import Any
 from unittest.mock import patch
 
-from click.testing import CliRunner
 import pytest
+from click.testing import CliRunner
 
-from tests.util import read_data, DETERMINISTIC_HEADER
+from tests.util import DETERMINISTIC_HEADER, read_data
 
 try:
-    import blackd
-    from aiohttp.test_utils import AioHTTPTestCase
     from aiohttp import web
+    from aiohttp.test_utils import AioHTTPTestCase
+
+    import blackd
 except ImportError as e:
     raise RuntimeError("Please install Black with the 'd' extra") from e
 

tests/test_format.py

@@ -8,10 +8,10 @@
 from tests.util import (
     DEFAULT_MODE,
     PY36_VERSIONS,
+    all_data_cases,
     assert_format,
     dump_to_stderr,
     read_data,
-    all_data_cases,
 )
 
 

tests/test_ipynb.py

@@ -1,23 +1,24 @@
 import contextlib
-from dataclasses import replace
 import pathlib
 import re
 from contextlib import ExitStack as does_not_raise
+from dataclasses import replace
 from typing import ContextManager
 
+import pytest
+from _pytest.monkeypatch import MonkeyPatch
 from click.testing import CliRunner
-from black.handle_ipynb_magics import jupyter_dependencies_are_installed
+
 from black import (
-    main,
+    Mode,
     NothingChanged,
     format_cell,
     format_file_contents,
     format_file_in_place,
+    main,
 )
-import pytest
-from black import Mode
-from _pytest.monkeypatch import MonkeyPatch
-from tests.util import DATA_DIR, read_jupyter_notebook, get_case_path
+from black.handle_ipynb_magics import jupyter_dependencies_are_installed
+from tests.util import DATA_DIR, get_case_path, read_jupyter_notebook
 
 with contextlib.suppress(ModuleNotFoundError):
     import IPython

tests/test_no_ipynb.py

@@ -1,10 +1,11 @@
-import pytest
 import pathlib
 
-from tests.util import get_case_path
-from black import main, jupyter_dependencies_are_installed
+import pytest
 from click.testing import CliRunner
 
+from black import jupyter_dependencies_are_installed, main
+from tests.util import get_case_path
+
 pytestmark = pytest.mark.no_jupyter
 
 runner = CliRunner()

tests/test_trans.py

@@ -1,4 +1,5 @@
 from typing import List, Tuple
+
 from black.trans import iter_fexpr_spans