I'm currently developing a console program in Python 3.9.
I want to detect the shutdown of Windows and save the data to a file safely.
I created a sample program by referring to the following URL.
https://docs.microsoft.com/en-us/windows/console/registering-a-control-handler-function
However, the sample program does not detect shutdown
(CTRL_SHUTDOWN_EVENT) well.
I have confirmed that CTRL_C_EVENT and CTRL_CLOSE_EVENT can be detected
successfully.
Please let me know how to detect a successful shutdown.
Sincerely,
Expected behavior and actual behavior.
detecting the shutdown of Windows
Steps to reproduce the problem.
python mian.py
Version of Python and pywin32
Python 3.8.11
pywin32 version 228
# Python Code : main.py
import time
import win32api
import win32con
def ctrl_handler(evt):
with open('event_info.txt', 'a') as f:
if evt == win32con.CTRL_C_EVENT:
f.write("CTRL_C_EVENT\n")
return True
elif evt == win32con.CTRL_CLOSE_EVENT:
f.write("CTRL_CLOSE_EVENT\n")
return True
elif evt == win32con.CTRL_BREAK_EVENT:
f.write("CTRL_BREAK_EVENT\n")
return False
elif evt == win32con.CTRL_LOGOFF_EVENT:
f.write("CTRL_LOGOFF_EVENT\n")
return False
elif evt == win32con.CTRL_SHUTDOWN_EVENT:
f.write("CTRL_SHUTDOWN_EVENT\n")
return False
else:
return False
def main():
print('Starting Program!')
win32api.SetConsoleCtrlHandler(ctrl_handler, True)
while True:
time.sleep(1)
print('End of Program!')
if __name__ == "__main__":
main()
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