Suspend / Hibernate pc with python

Question

I\'d like to write a short python script that puts my computer to sleep. I\'Ve already searched the API but the only result on suspend has to do with delayed execution. What

Answer 1

Get pywin32, it also contains win32security if I remember correctly. Then try the mentioned script again.

Answer 2

subprocess.call(['osascript', '-e','tell app "System Events" to sleep'])

Answer 3

You can run shell command from python script. See subprocess module and then search for appropriate command for your operating system.

Answer 4

I don't know how to sleep. But I know how to Hibernate (on Windows). Perhaps that is enough? shutdown.exe is your friend! Run it from the command prompt.

To see its options do shutdown.exe /?

I believe a hibernate call would be: shutdown.exe /h

So, putting it all together in python:

import os
os.system("shutdown.exe /h")

But as other have mentioned, it is bad to use os.system. Use the popen instead. But, if you're lazy like me and its a little script them meh! os.system it is for me.

Answer 5

If you're using Windows, see: http://permalink.gmane.org/gmane.comp.python.windows/7382

Answer 6

Without resorting to shell execution, if you have pywin32 and ctypes:

import ctypes
import win32api
import win32security

def suspend(hibernate=False):
    """Puts Windows to Suspend/Sleep/Standby or Hibernate.

    Parameters
    ----------
    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()
    """
    # 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:
        ctypes.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 you want just a one-liner with pywin32 and has the right permissions already (for a simple, personal script):

import win32api
win32api.SetSystemPowerState(True, True)  # <- if you want to Suspend
win32api.SetSystemPowerState(False, True)  # <- if you want to Hibernate

Note: if your system has disabled hibernation, it will suspend. In the first function I included a check to at least warn of this.