Device List doesnot work with python bindings

[pulkitag]

Camera Model: D435
Firmware Version: 05.08.15.00
Operating Version: Ubuntu 18.04
Kernel Version: 4.15.0-32
Platform: PC
SDK Version: 2.16.0
Language: Python

Issue Description

I run the following

import pyrealsense2 as pr
deviceList  = pr.device_list()
print (deviceList.size())

I get the response as 0.

However, when I run the same code through C++, I get the response as 1. This is a problem because now I cannot access individual devices through Python, but I can easily do this using C++.

Furthermore, I have no problems getting data through pipeline in python. So python-api is certainly able to read data from the camera, but somehow doesnot list the devices. Any clues/pointers on what might be happening?

[holowgen]

import pyrealsense2 as rs
ctx = rs.context()
if len(ctx.devices) > 0:
for d in ctx.devices:
print ('Found device: ',
d.get_info(rs.camera_info.name), ' ',
d.get_info(rs.camera_info.serial_number))
else:
print("No Intel Device connected")

[RealSense-Customer-Engineering]

[Realsense Customer Engineering Team Comment]
Hi pulkitag,

Please try the code sample below and it should fix your issue.
Thanks holowgen for sharing a solution.

Please see the details of wrapper definitions here:

rss_context.cpp
https://github.com/IntelRealSense/librealsense/blob/master/wrappers/python/python.cpp#L214

rs2_device.hpp
https://github.com/IntelRealSense/librealsense/blob/master/wrappers/python/python.cpp#L236

Thanks!