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fixing issue 14168 with None/None case in TarFile #14172

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@alexeev-prog alexeev-prog commented May 27, 2025

This PR fix issue 14168 with stdlib/TarFile (name=None, fileobj=None case). This pr add overriding typing for __init__, and other methods (open and etc).

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please, don't forget about .open and other methods.

@overload
def __init__( # noqa: F811
self,
name: StrOrBytesPath | None,
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Suggested change
name: StrOrBytesPath | None,
name: StrOrBytesPath,

@overload
def __init__(
self,
fileobj: _Fileobj,
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Suggested change
fileobj: _Fileobj,
fileobj: _Fileobj,
*,

@overload
def __init__( # noqa: F811
self,
name: StrOrBytesPath | None,
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Suggested change
name: StrOrBytesPath | None,
name: StrOrBytesPath,

) -> None: ...
def __init__(
self,
fileobj: _Fileobj,
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fileobj: _Fileobj,
fileobj: _Fileobj,
*,

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Thanks for this!

@alexeev-prog alexeev-prog reopened this May 27, 2025

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This is already done?

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All the failed tests don't seem to apply to my changes and to the TarFile. Otherwise, everything should work.

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Thanks for the review! I'll apply it today or tomorrow. Apologies for the merge main.

@alexeev-prog alexeev-prog changed the title start fixing issue 14168 with TarFile fixing issue 14168 with None/None case in TarFile Jul 4, 2025
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If it helps, you can run stubtest locally with the command

python -m mypy.stubtest --check-typeshed --show-traceback --custom-typeshed-dir . --allowlist stdlib/@tests/stubtest_allowlists/common.txt --allowlist stdlib/@tests/stubtest_allowlists/linux.txt --allowlist stdlib/@tests/stubtest_allowlists/py314.txt

(replace linux.txt and py314.txt with appropriate values for you environment)

You can also run pre-commit run -a locally to apply the code formatter.

Thanks for working on this!

@alexeev-prog
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If it helps, you can run stubtest locally with the command

python -m mypy.stubtest --check-typeshed --show-traceback --custom-typeshed-dir . --allowlist stdlib/@tests/stubtest_allowlists/common.txt --allowlist stdlib/@tests/stubtest_allowlists/linux.txt --allowlist stdlib/@tests/stubtest_allowlists/py314.txt

(replace linux.txt and py314.txt with appropriate values for you environment)

You can also run pre-commit run -a locally to apply the code formatter.

Thanks for working on this!

Thanks!

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github-actions bot commented Jul 4, 2025

Diff from mypy_primer, showing the effect of this PR on open source code:

pandas (https://github.com/pandas-dev/pandas)
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['r', 'r:*', 'r:', 'r:gz', 'r:bz2', 'r:xz'] = ..., fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes], mode: Literal['r', 'r:*', 'r:', 'r:gz', 'r:bz2', 'r:xz'] = ..., fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, fileobj: _Fileobj, *, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['r', 'r:*', 'r:', 'r:gz', 'r:bz2', 'r:xz'] = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, *, fileobj: _Fileobj, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['r', 'r:*', 'r:', 'r:gz', 'r:bz2', 'r:xz'] = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | None, mode: Literal['x', 'x:', 'a', 'a:', 'w', 'w:', 'w:tar'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes], mode: Literal['x', 'x:', 'a', 'a:', 'w', 'w:', 'w:tar'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., *, mode: Literal['x', 'x:', 'a', 'a:', 'w', 'w:', 'w:tar'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, fileobj: _Fileobj, *, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['x', 'x:', 'a', 'a:', 'w', 'w:', 'w:tar'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, *, fileobj: _Fileobj, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['x', 'x:', 'a', 'a:', 'w', 'w:', 'w:tar'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | None, mode: Literal['x:gz', 'x:bz2', 'w:gz', 'w:bz2'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes], mode: Literal['x:gz', 'x:bz2', 'w:gz', 'w:bz2'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., *, mode: Literal['x:gz', 'x:bz2', 'w:gz', 'w:bz2'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, fileobj: _Fileobj, *, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['x:gz', 'x:bz2', 'w:gz', 'w:bz2'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, *, fileobj: _Fileobj, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['x:gz', 'x:bz2', 'w:gz', 'w:bz2'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | None, mode: Literal['x:xz', 'w:xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., preset: Literal[0, 1, 2, 3, 4, 5, 6, 7, 8, 9] | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes], mode: Literal['x:xz', 'w:xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., preset: Literal[0, 1, 2, 3, 4, 5, 6, 7, 8, 9] | None = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., *, mode: Literal['x:xz', 'w:xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., preset: Literal[0, 1, 2, 3, 4, 5, 6, 7, 8, 9] | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, fileobj: _Fileobj, *, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['x:xz', 'w:xz'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., preset: Literal[0, 1, 2, 3, 4, 5, 6, 7, 8, 9] | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, *, fileobj: _Fileobj, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['x:xz', 'w:xz'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., preset: Literal[0, 1, 2, 3, 4, 5, 6, 7, 8, 9] | None = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None, mode: Literal['r|*', 'r|', 'r|gz', 'r|bz2', 'r|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer, mode: Literal['r|*', 'r|', 'r|gz', 'r|bz2', 'r|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., *, mode: Literal['r|*', 'r|', 'r|gz', 'r|bz2', 'r|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, fileobj: _Fileobj, *, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., mode: Literal['r|*', 'r|', 'r|gz', 'r|bz2', 'r|xz'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, *, fileobj: _Fileobj, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., mode: Literal['r|*', 'r|', 'r|gz', 'r|bz2', 'r|xz'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None, mode: Literal['w|', 'w|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer, mode: Literal['w|', 'w|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., *, mode: Literal['w|', 'w|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, fileobj: _Fileobj, *, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., mode: Literal['w|', 'w|xz'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, *, fileobj: _Fileobj, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., mode: Literal['w|', 'w|xz'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None, mode: Literal['w|gz', 'w|bz2'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer, mode: Literal['w|gz', 'w|bz2'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
- pandas/io/common.py:995: note:     def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., *, mode: Literal['w|gz', 'w|bz2'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, fileobj: _Fileobj, *, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., mode: Literal['w|gz', 'w|bz2'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
+ pandas/io/common.py:995: note:     def open(cls, *, fileobj: _Fileobj, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., mode: Literal['w|gz', 'w|bz2'], bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., compresslevel: int = ...) -> TarFile
+ pandas/_testing/_io.py:141: error: No overload variant of "TarFile" matches argument types "Any", "str"  [call-overload]
+ pandas/_testing/_io.py:141: note:     def __init__(self, name: str | bytes | PathLike[str] | PathLike[bytes], mode: Literal['r', 'a', 'w', 'x'] = ..., fileobj: _Fileobj | None = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., copybufsize: int | None = ...) -> TarFile
+ pandas/_testing/_io.py:141: note:     def __init__(self, fileobj: _Fileobj, *, name: str | bytes | PathLike[str] | PathLike[bytes] | None = ..., mode: Literal['r', 'a', 'w', 'x'] = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ..., copybufsize: int | None = ...) -> TarFile
- pandas/_testing/_io.py:141: error: Argument "mode" to "TarFile" has incompatible type "str"; expected "Literal['r', 'a', 'w', 'x']"  [arg-type]

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tarfile.TarFile has several missing overloads
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