linux python check process running. original: https://stackoverflow.com/questions/788411/check-to-see-if-python-script-is-running

get_lock.py

import socket

def get_lock(process_name):
    get_lock._lock_socket = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
    try:
        get_lock._lock_socket.bind('\0' + process_name)
        return True
    except socket.error:
        return False