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ctypes: improve bytes handling #9029

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Merged
merged 3 commits into from
Oct 31, 2022
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ctypes: improve bytes handling #9029

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375bfc1
ctypes: improve bytes handling
JelleZijlstra Oct 29, 2022
d490fce
ignore stubtest
JelleZijlstra Oct 29, 2022
956fb67
Update tests/stubtest_allowlists/py3_common.txt
JelleZijlstra Oct 31, 2022
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8 changes: 6 additions & 2 deletions stdlib/ctypes/__init__.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -194,7 +194,7 @@ class _SimpleCData(Generic[_T], _CData):
class c_byte(_SimpleCData[int]): ...

class c_char(_SimpleCData[bytes]):
def __init__(self, value: int | bytes = ...) -> None: ...
def __init__(self, value: int | bytes | bytearray = ...) -> None: ...
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I failed to trace through the code for this, but I trust this is correct.

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I didn't find the code either but tried it in the REPL. This one allows bytearray but c_char_p doesn't.


class c_char_p(_PointerLike, _SimpleCData[bytes | None]):
def __init__(self, value: int | bytes | None = ...) -> None: ...
Expand Down Expand Up @@ -266,7 +266,11 @@ class Array(Generic[_CT], _CData):
def _type_(self) -> type[_CT]: ...
@_type_.setter
def _type_(self, value: type[_CT]) -> None: ...
raw: bytes # Note: only available if _CT == c_char
# Note: only available if _CT == c_char
@property
def raw(self) -> bytes: ...
@raw.setter
def raw(self, value: ReadableBuffer) -> None: ...
value: Any # Note: bytes if _CT == c_char, str if _CT == c_wchar, unavailable otherwise
# TODO These methods cannot be annotated correctly at the moment.
# All of these "Any"s stand for the array's element type, but it's not possible to use _CT
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2 changes: 2 additions & 0 deletions tests/stubtest_allowlists/py3_common.txt
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Expand Up @@ -367,6 +367,8 @@ _ctypes.sizeof
# Allowlist entries that cannot or should not be fixed
# ==========

ctypes.Array.raw # exists but stubtest can't see it; only available if _CT == c_char

_collections_abc.AsyncGenerator.asend # async at runtime, deliberately not in the stub, see #7491. Pos-only differences also.
_collections_abc.AsyncGenerator.__anext__ # async at runtime, deliberately not in the stub, see #7491
_collections_abc.AsyncGenerator.aclose # async at runtime, deliberately not in the stub, see #7491
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