in usb_monitor_pkg/usb_monitor_pkg/usb_monitor_node.py [0:0]
def block_device_monitor(self, device):
"""Function callback passed to pyudev.MonitorObserver to monitor USB connection.
Args:
device (pyudev.Device): USB Device with attached attributes and properties.
"""
# Only care about new insertions.
if device.action == "add":
self.queue.put(device)