From: John Snow <jsnow@xxxxxxxxxx> mypy considers it incorrect to use `bool` to statically return false, because it will assume that it could conceivably return True, and gives different analysis in that case. Use a None return to achieve the same effect, but make mypy happy. Note: Pylint considers function signatures as code that might trip the duplicate-code checker. I'd rather not disable this as it does not trigger often in practice, so I'm disabling it as a one-off and filed a change request; see https://github.com/PyCQA/pylint/issues/3619 Signed-off-by: John Snow <jsnow@xxxxxxxxxx> Acked-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx> Message-Id: <20200514055403.18902-14-jsnow@xxxxxxxxxx> Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx> --- python/qemu/machine.py | 8 ++++++-- python/qemu/qmp.py | 10 ++++++++-- 2 files changed, 14 insertions(+), 4 deletions(-) diff --git a/python/qemu/machine.py b/python/qemu/machine.py index 95a20a17f9..041c615052 100644 --- a/python/qemu/machine.py +++ b/python/qemu/machine.py @@ -24,6 +24,8 @@ import shutil import socket import tempfile +from typing import Optional, Type +from types import TracebackType from . import qmp @@ -124,9 +126,11 @@ def __init__(self, binary, args=None, wrapper=None, name=None, def __enter__(self): return self - def __exit__(self, exc_type, exc_val, exc_tb): + def __exit__(self, + exc_type: Optional[Type[BaseException]], + exc_val: Optional[BaseException], + exc_tb: Optional[TracebackType]) -> None: self.shutdown() - return False def add_monitor_null(self): """ diff --git a/python/qemu/qmp.py b/python/qemu/qmp.py index 73d49050ed..b91c9d5c1c 100644 --- a/python/qemu/qmp.py +++ b/python/qemu/qmp.py @@ -14,7 +14,9 @@ from typing import ( Optional, TextIO, + Type, ) +from types import TracebackType class QMPError(Exception): @@ -146,10 +148,14 @@ def __enter__(self): # Implement context manager enter function. return self - def __exit__(self, exc_type, exc_value, exc_traceback): + def __exit__(self, + # pylint: disable=duplicate-code + # see https://github.com/PyCQA/pylint/issues/3619 + exc_type: Optional[Type[BaseException]], + exc_val: Optional[BaseException], + exc_tb: Optional[TracebackType]) -> None: # Implement context manager exit function. self.close() - return False def connect(self, negotiate=True): """ -- 2.21.3
