in usb_monitor_pkg/usb_monitor_pkg/usb_monitor_node.py [0:0]
def start(self):
"""Initializing function to start monitoring.
"""
# Enumerate and process already connected media before enabling the monitor.
for device in self.pd_context.list_devices(subsystem="block"):
self.queue.put(device)
if self.observer is not None:
self.observer.start()