The vivo_technologies module

Autogenerated API documentation for vivo_technologies

Driver for a Vivo Technologies LS-689A barcode scanner

PyExpLabSys.drivers.vivo_technologies.detect_barcode_device()

Return the input device path of the Barcode Scanner

Iterates over all devices in /dev/input/event?? and looks for one that has ‘Barcode Reader’ in its description.

Returns:The Barcode Scanner device path Return type:str

class PyExpLabSys.drivers.vivo_technologies.BlockingBarcodeReader(device_path)

Bases: object

Blocking Barcode Reader

__init__(device_path)

Initialize self. See help(type(self)) for accurate signature.

read_barcode()

Wait for a barcode and return it

close()

Close the device

class PyExpLabSys.drivers.vivo_technologies.ThreadedBarcodeReader(device_path)

Bases: threading.Thread

Threaded Barcode Scanner that holds only the last value

__init__(device_path)

This constructor should always be called with keyword arguments. Arguments are:

group should be None; reserved for future extension when a ThreadGroup class is implemented.

target is the callable object to be invoked by the run() method. Defaults to None, meaning nothing is called.

name is the thread name. By default, a unique name is constructed of the form “Thread-N” where N is a small decimal number.

args is the argument tuple for the target invocation. Defaults to ().

kwargs is a dictionary of keyword arguments for the target invocation. Defaults to {}.

If a subclass overrides the constructor, it must make sure to invoke the base class constructor (Thread.__init__()) before doing anything else to the thread.

run()

The threaded run method

last_barcode_in_queue

Last barcode in the queue

wait_for_barcode

Last barcode property

oldest_barcode_from_queue

Get one barcode from the queue if there is one

close()

Close the device