If you want generic USB access you should be looking into 'libusb'. You can only access USB Serial Adapters using pyserial (i.e., USB RS-232 dongles). Check the end meant to plug into your Mac or iPad Pro. To find the right cable or adapter for your Mac or iPad Pro, use the information below to identify the connector on the end of the cable coming from your display, hard drive, camera, hub, or other device. iPad Pro models that have a USB-C port.These ports support both Thunderbolt 3 and USB-C connections. Mac models that have Thunderbolt 3 ports.The adapters and cables in this article work with these Mac computers and iPad Pro devices:
