NoSuspend.py

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This is a library to prevent the system from entering powersaving mode such as ACPI S1-4.

Requirements

• For Linux you need python3-dbus and some programms providing the used D-Bus interfaces.

Tutorial

• A very basic cross-platform way.
• Import the lib:

from NoSuspend import *

• Use the context manager:

with NoSuspend():
	doLongWork()

• You can provide additional arguments depending on platform:

• on Windows you can provide additional parameters, for example to keep the screen enabled

with NoSuspend(suspend=True, display=True, hidden=False, inherit=True):
	doLongWork()

• on Linux (with desktop environment) you can provide your application name and the reason

with NoSuspend(suspend=True, display=False, hidden=False, appName="MySuperApp", reason="doing long work..."):
	doLongWork()

• You can retrieve the state when used context manager:

with NoSuspend() as state:
	print(state)

on Windows you can just retrieve it using

print(NoSuspend.getCurrentState())

• The state is nested, the default state on Windows is EXECUTION_STATE.CONTINUOUS | EXECUTION_STATE.SYSTEM_REQUIRED ( coresponds to suspend=True ) as expected. There are 2 inherit modes:

print(NoSuspend.getCurrentState())
with NoSuspend() as state1:
	print(state1, NoSuspend.getCurrentState())
	with NoSuspend(display=True, inherit=False) as state2: # the default one, replaces the state
		print(state2, NoSuspend.getCurrentState())
	print(NoSuspend.getCurrentState())

print(NoSuspend.getCurrentState())
with NoSuspend() as state1:
	print(state1, NoSuspend.getCurrentState())
	with NoSuspend(EXECUTION_STATE.DISPLAY_REQUIRED, inherit=True) as state2: # adds flags to the state
		print(state2, NoSuspend.getCurrentState())
	print(NoSuspend.getCurrentState())

Also a console interface is available

python3 -m NoSuspend echo a
NoSuspend echo a
caffeinate echo a