[英]time.sleep does not work for multithreaded
当我发现time.sleep()
没有挂起运行pywin32
模块的线程时,我试图对Ronan Paixão提供的“Suspend / Hibernate pc with python”的代码进行多线程处理。
>>> 警告! 以下代码将使 Windows 进入睡眠状态 <<<
def suspend(buffer, hibernate=False):
'''Puts Windows to Suspend/Sleep/Standby or Hibernate.
Parameters
----------
buffer: string, for time.sleep()
hibernate: bool, default False
If False (default), system will enter Suspend/Sleep/Standby state.
If True, system will Hibernate, but only if Hibernate is enabled in the
system settings. If it's not, system will Sleep.
Example:
--------
>>> suspend()
'''
print('before sleep')
sleep(float(buffer))
print('after sleep')
# Enable the SeShutdown privilege (which must be present in your
# token in the first place)
priv_flags = (win32security.TOKEN_ADJUST_PRIVILEGES |
win32security.TOKEN_QUERY)
hToken = win32security.OpenProcessToken(
win32api.GetCurrentProcess(),
priv_flags
)
priv_id = win32security.LookupPrivilegeValue(
None,
win32security.SE_SHUTDOWN_NAME
)
old_privs = win32security.AdjustTokenPrivileges(
hToken,
0,
[(priv_id, win32security.SE_PRIVILEGE_ENABLED)]
)
if (win32api.GetPwrCapabilities()['HiberFilePresent'] == False and
hibernate == True):
import warnings
warnings.warn("Hibernate isn't available. Suspending.")
try:
windll.powrprof.SetSuspendState(not hibernate, True, False)
except:
# True=> Standby; False=> Hibernate
# https://msdn.microsoft.com/pt-br/library/windows/desktop/aa373206(v=vs.85).aspx
# says the second parameter has no effect.
# ctypes.windll.kernel32.SetSystemPowerState(not hibernate, True)
win32api.SetSystemPowerState(not hibernate, True)
# Restore previous privileges
win32security.AdjustTokenPrivileges(
hToken,
0,
old_privs
)
if __name__ == '__main__':
Thread(target=suspend, args=("10")).start()
print
函数确实等待time.sleep()
,但 Windows 立即进入睡眠状态。 发生了什么?
您在对Thread
的调用中错误地传递了缓冲区参数,因此它仅sleep
1.0 秒。 您需要在args
关键字参数的值末尾添加一个逗号,
如下所示:
.
.
if __name__ == '__main__':
Thread(target=suspend, args=("10",)).start()
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.