closing transport layer without init

[sagregrevc]

Describe what you want to implement and what the issue & the steps to reproduce it are:

I try to find all sn of all connected devices. than I would like to close it.

tlFactory = pylon.TlFactory.GetInstance()

# Get all attached devices and exit application if no device is found.
devices = tlFactory.EnumerateDevices()
camera_names_set = set()

# Iterate through the list of devices
for device in devices:
    camera_names_set.add(device.GetFriendlyName())

pylon.TlFactory.ReleaseTl() # TODO: not worked

after I would like make class with some of this cameras. but camera cannot be reached

info = pylon.DeviceInfo()
info.SetSerialNumber(self.id)

try:
    self.camera_obj = pylon.InstantCamera(
        pylon.TlFactory.GetInstance().CreateFirstDevice(info)
    )
except Exception as ex:
    logger.critical(ex)
    st.error(
        "camera probably open by different software. "
    )
    st.status.update(label="", expanded=True, state="error")
    st.stop()

self.camera_obj.Open()

Is your camera operational in Basler pylon viewer on your platform

Yes

Hardware setup & camera model(s) used

x64, win10, 8Gb, USB3, 1m

Runtime information:

how I can close transport layer if I dont have object ?

[thiesmoeller]

Standard way to solve your use-case is like this:

import pypylon.pylon as py

tlFactory = py.TlFactory.GetInstance()

# Get all attached devices and exit application if no device is found.
devices = tlFactory.EnumerateDevices()

class CamWrapper:
    def __init__(self, device : py.DeviceInfo):
        self.camera_obj = py.InstantCamera(
            tlFactory.CreateDevice(device)
        )
        self.camera_obj.Open()

    def __del__(self):
        self.camera_obj.Close()

    def __str__(self):
        return f"CamWrapper <{self.camera_obj.DeviceInfo.GetFriendlyName()}>"

Select one of the cameras from the list of devices:

cam = CamWrapper(devices[0])

print(cam)

CamWrapper <Basler a2A4508-6gcPRO (40271242)>

del(cam)

[sagregrevc]

seems reason was in my code. cameras sn was processed by different way in different parts of code