Creating a single instance application « Python recipes « ActiveState Code
Creating a single instance application (Python recipe) by Dragan Jovelic Sometimes it is necessary to ensure that only one instance of application is running. This quite simple solution uses mutex to achieve this, and will run only on Windows platform. from win32event import CreateMutex from win32api import CloseHandle, GetLastError from winerror import ERROR_ALREADY_EXISTS class singleinstance: "
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