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python: Reformat with Black, except quotes.

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Signed-off-by: Anders Kaseorg <anders@zulip.com>
This commit is contained in:
Anders Kaseorg
2021-02-11 23:19:30 -08:00
committed by Tim Abbott
parent 5028c081cb
commit 11741543da
817 changed files with 44952 additions and 24860 deletions
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30
zerver/lib/timeout.py
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@@ -7,29 +7,32 @@ from typing import Any, Callable, Optional, Tuple, Type, TypeVar
# Based on https://code.activestate.com/recipes/483752/
class TimeoutExpired(Exception):
'''Exception raised when a function times out.'''
def __str__(self) -> str:
return 'Function call timed out.'
ResultT = TypeVar('ResultT')
def timeout(timeout: float, func: Callable[..., ResultT], *args: Any, **kwargs: Any) -> ResultT:
'''Call the function in a separate thread.
Return its return value, or raise an exception,
within approximately 'timeout' seconds.
"""Call the function in a separate thread.
Return its return value, or raise an exception,
within approximately 'timeout' seconds.
The function may receive a TimeoutExpired exception
anywhere in its code, which could have arbitrary
unsafe effects (resources not released, etc.).
It might also fail to receive the exception and
keep running in the background even though
timeout() has returned.
The function may receive a TimeoutExpired exception
anywhere in its code, which could have arbitrary
unsafe effects (resources not released, etc.).
It might also fail to receive the exception and
keep running in the background even though
timeout() has returned.
This may also fail to interrupt functions which are
stuck in a long-running primitive interpreter
operation.'''
This may also fail to interrupt functions which are
stuck in a long-running primitive interpreter
operation."""
class TimeoutThread(threading.Thread):
def __init__(self) -> None:
@@ -57,7 +60,8 @@ def timeout(timeout: float, func: Callable[..., ResultT], *args: Any, **kwargs:
assert self.ident is not None # Thread should be running; c_long expects int
tid = ctypes.c_long(self.ident)
result = ctypes.pythonapi.PyThreadState_SetAsyncExc(
tid, ctypes.py_object(TimeoutExpired))
tid, ctypes.py_object(TimeoutExpired)
)
if result > 1:
# "if it returns a number greater than one, you're in trouble,
# and you should call it again with exc=NULL to revert the effect"