apply black and isort (#4287)

* apply black and isort

* move some type ignores

stdlib/2and3/mailbox.pyi

@@ -1,9 +1,31 @@
-from typing import Optional, Union, Text, AnyStr, Callable, IO, Any, Iterator, List, Tuple, TypeVar, Protocol, Dict, Sequence, Iterable, Generic, Type, Mapping, overload
-from types import TracebackType
 import email
-from _typeshed import AnyPath
+from types import TracebackType
+from typing import (
+    IO,
+    Any,
+    AnyStr,
+    Callable,
+    Dict,
+    Generic,
+    Iterable,
+    Iterator,
+    List,
+    Mapping,
+    Optional,
+    Protocol,
+    Sequence,
+    Text,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+    overload,
+)
+
 from typing_extensions import Literal
 
+from _typeshed import AnyPath
+
 _T = TypeVar("_T")
 _MessageType = TypeVar("_MessageType", bound=Message)
 _MessageData = Union[email.message.Message, bytes, str, IO[str], IO[bytes]]
@@ -20,7 +42,6 @@ class Mailbox(Generic[_MessageType]):
 
     _path: Union[bytes, str]  # undocumented
     _factory: Optional[Callable[[IO[Any]], _MessageType]]  # undocumented
-
     def __init__(self, path: AnyPath, factory: Optional[Callable[[IO[Any]], _MessageType]] = ..., create: bool = ...) -> None: ...
     def add(self, message: _MessageData) -> str: ...
     def remove(self, key: str) -> None: ...
@@ -61,10 +82,10 @@ class Mailbox(Generic[_MessageType]):
 class Maildir(Mailbox[MaildirMessage]):
 
     colon: str
-
-    def __init__(self, dirname: AnyPath, factory: Optional[Callable[[IO[Any]], MaildirMessage]] = ..., create: bool = ...) -> None: ...
+    def __init__(
+        self, dirname: AnyPath, factory: Optional[Callable[[IO[Any]], MaildirMessage]] = ..., create: bool = ...
+    ) -> None: ...
     def get_file(self, key: str) -> _ProxyFile[bytes]: ...
-
     def list_folders(self) -> List[str]: ...
     def get_folder(self, folder: Text) -> Maildir: ...
     def add_folder(self, folder: Text) -> Maildir: ...
@@ -75,22 +96,21 @@ class Maildir(Mailbox[MaildirMessage]):
 class _singlefileMailbox(Mailbox[_MessageType]): ...
 
 class _mboxMMDF(_singlefileMailbox[_MessageType]):
-
     def get_file(self, key: str) -> _PartialFile[bytes]: ...
 
 class mbox(_mboxMMDF[mboxMessage]):
-
-    def __init__(self, dirname: AnyPath, factory: Optional[Callable[[IO[Any]], mboxMessage]] = ..., create: bool = ...) -> None: ...
+    def __init__(
+        self, dirname: AnyPath, factory: Optional[Callable[[IO[Any]], mboxMessage]] = ..., create: bool = ...
+    ) -> None: ...
 
 class MMDF(_mboxMMDF[MMDFMessage]):
-
-    def __init__(self, dirname: AnyPath, factory: Optional[Callable[[IO[Any]], MMDFMessage]] = ..., create: bool = ...) -> None: ...
+    def __init__(
+        self, dirname: AnyPath, factory: Optional[Callable[[IO[Any]], MMDFMessage]] = ..., create: bool = ...
+    ) -> None: ...
 
 class MH(Mailbox[MHMessage]):
-
     def __init__(self, dirname: AnyPath, factory: Optional[Callable[[IO[Any]], MHMessage]] = ..., create: bool = ...) -> None: ...
     def get_file(self, key: str) -> _ProxyFile[bytes]: ...
-
     def list_folders(self) -> List[str]: ...
     def get_folder(self, folder: AnyPath) -> MH: ...
     def add_folder(self, folder: AnyPath) -> MH: ...
@@ -100,18 +120,16 @@ class MH(Mailbox[MHMessage]):
     def pack(self) -> None: ...
 
 class Babyl(_singlefileMailbox[BabylMessage]):
-
-    def __init__(self, dirname: AnyPath, factory: Optional[Callable[[IO[Any]], BabylMessage]] = ..., create: bool = ...) -> None: ...
-
+    def __init__(
+        self, dirname: AnyPath, factory: Optional[Callable[[IO[Any]], BabylMessage]] = ..., create: bool = ...
+    ) -> None: ...
     def get_file(self, key: str) -> IO[bytes]: ...
     def get_labels(self) -> List[str]: ...
 
 class Message(email.message.Message):
-
     def __init__(self, message: Optional[_MessageData] = ...) -> None: ...
 
 class MaildirMessage(Message):
-
     def get_subdir(self) -> str: ...
     def set_subdir(self, subdir: Literal["new", "cur"]) -> None: ...
     def get_flags(self) -> str: ...
@@ -124,9 +142,10 @@ class MaildirMessage(Message):
     def set_info(self, info: str) -> None: ...
 
 class _mboxMMDFMessage(Message):
-
     def get_from(self) -> str: ...
-    def set_from(self, from_: str, time_: Optional[Union[bool, Tuple[int, int, int, int, int, int, int, int, int]]] = ...) -> None: ...
+    def set_from(
+        self, from_: str, time_: Optional[Union[bool, Tuple[int, int, int, int, int, int, int, int, int]]] = ...
+    ) -> None: ...
     def get_flags(self) -> str: ...
     def set_flags(self, flags: Iterable[str]) -> None: ...
     def add_flag(self, flag: str) -> None: ...
@@ -135,14 +154,12 @@ class _mboxMMDFMessage(Message):
 class mboxMessage(_mboxMMDFMessage): ...
 
 class MHMessage(Message):
-
     def get_sequences(self) -> List[str]: ...
     def set_sequences(self, sequences: Iterable[str]) -> None: ...
     def add_sequence(self, sequence: str) -> None: ...
     def remove_sequence(self, sequence: str) -> None: ...
 
 class BabylMessage(Message):
-
     def get_labels(self) -> List[str]: ...
     def set_labels(self, labels: Iterable[str]) -> None: ...
     def add_label(self, label: str) -> None: ...
@@ -154,7 +171,6 @@ class BabylMessage(Message):
 class MMDFMessage(_mboxMMDFMessage): ...
 
 class _ProxyFile(Generic[AnyStr]):
-
     def __init__(self, f: IO[AnyStr], pos: Optional[int] = ...) -> None: ...
     def read(self, size: Optional[int] = ...) -> AnyStr: ...
     def read1(self, size: Optional[int] = ...) -> AnyStr: ...
@@ -165,7 +181,9 @@ class _ProxyFile(Generic[AnyStr]):
     def seek(self, offset: int, whence: int = ...) -> None: ...
     def close(self) -> None: ...
     def __enter__(self) -> _ProxyFile[AnyStr]: ...
-    def __exit__(self, exc_type: Optional[Type[BaseException]], exc: Optional[BaseException], tb: Optional[TracebackType]) -> None: ...
+    def __exit__(
+        self, exc_type: Optional[Type[BaseException]], exc: Optional[BaseException], tb: Optional[TracebackType]
+    ) -> None: ...
     def readable(self) -> bool: ...
     def writable(self) -> bool: ...
     def seekable(self) -> bool: ...
@@ -174,15 +192,10 @@ class _ProxyFile(Generic[AnyStr]):
     def closed(self) -> bool: ...
 
 class _PartialFile(_ProxyFile[AnyStr]):
-
     def __init__(self, f: IO[AnyStr], start: Optional[int] = ..., stop: Optional[int] = ...) -> None: ...
 
 class Error(Exception): ...
-
 class NoSuchMailboxError(Error): ...
-
 class NotEmptyError(Error): ...
-
 class ExternalClashError(Error): ...
-
 class FormatError(Error): ...