Realsense with Python3

[far-command-man]

Hi @srware ,
After your last commit, it is now possible to use T265/D435 with C++ code properly. However, I recently ran into a new issue. I follow the instructions given in README to add Python3 support in my image. I can import pyrealsense2 without any issue but it runs into an error once I declare RealSense sensor pipeline such as pipe = rs.pipeline(). It says AttributeError: module 'pyrealsense2' has no attribute 'pipeline'.
I saw this issue IntelRealSense/librealsense#4483 (comment) . The error messages we have looks the same but I am not sure how to resolve it in Yocto. Any help from your side is much appreciated.

[srware]

Hi @far-command-man,

Thanks for flagging this. The problem is actually directory structure related. The python libs install to "/usr/lib/python3.x/site-packages/pyrealsense2" which isn't in the PYTHON_PATH. If the libs are moved up one level to "site-packages" everything works as expected.

I will get it fixed!

Thanks.

[far-command-man]

@srware I checked out the "/usr/lib/python3.x/site-packages/pyrealsense2" and found pyrealsense shared object libraries there. I placed them under site-packages/ directory now everything works fine but of course the best way is to get them installed in respective directory originally. Thanks for the help! :)

[srware]

Should be fixed now.

Thanks.

[tpwrules]

I'm not sure this is the correct solution to the problem. Putting the shared libraries in site-packages can (although is unlikely to) interfere with other packages. The correct solution would be to copy the wrappers/python/pyrealsense2/__init__.py into the <etc>/site-packages/pyrealsense2 directory, along with the shared libraries. I'm not sure why that doesn't happen by default.

[persalteas]

Hi, thanks tpwrules, this worked.

After compiling librealsense (using cmake .. -DBUILD_PYTHON_BINDINGS:bool=true), i had the same issue when importing pyrealsense2 in python3.

However, your package is not necessarily in site-packages. You need to first identify where your pyrealsense2 is:
$ python3
>> import pyrealsense2 as rs
>> rs.__path__
['/usr/lib/python3/dist-packages/pyrealsense2']

Then copy the __init__.py file in your package's folder:

sudo cp ~/librealsense/wrappers/python/pyrealsense2/__init__.py /usr/lib/python3/dist-packages/pyrealsense2/ solved it for me.

EDIT: typo

[lorepieri8]

@persalteas instructions worked for me, there is a typo in his last line though:

sudo cp ~/librealsense/wrappers/python/pyrealsense2/__init__.py /usr/lib/python3/dist-packages/pyrealsense2/

[prog96]

@persalteas
Hello! I did the following but this error appeared. Do you know how to solve it?

import pyrealsense2 as rs
rs.path
Traceback (most recent call last):
File "", line 1, in
AttributeError: module 'pyrealsense2' has no attribute 'path'

[persalteas]

Hi edwin,
it's not rs.path, it's rs.__path__, try again with the double underscores.

[prog96]

I did that with the double underscores. It's just that when I copied it here it disappeared.

[srware]

@edwin9610 , I just tried to replicate this building an image from 'master' but it worked fine for me. I am assuming the pyrealsense2 library is being found in the path given it doesn't fail at the import stage.

I have now incorporated the recommendations in this thread into the master branch so maybe give it another go.

Thanks.

[prog96]

@srware Hi, sorry for the late reply.

I have these directories to the path.

jetson@jetson-desktop:~$ python -c "import sys; print(sys.path)"
['', '/home/jetson', '/usr/local/lib', '/usr/local/lib/python3.6/pyrealsense2', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-aarch64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/gtk-2.0']

as shown in the following screenshots.

But I still have the problem with this:
rs.path
Traceback (most recent call last):
File "", line 1, in
AttributeError: module 'pyrealsense2' has no attribute 'path'

What should I do now?

[punchnami]

I'm getting the same error as @edwin9610 , is there any solution?

Thank you in advance!

[persalteas]

In @edwin9610 's case, since the __init__.py file is present in the pyrealsense2 folder, i think the problem is that /usr/local/lib/python3.6 is not in the path (the list you provided).

@punchnami do you have the package installed somewhere ? Check that the folder contains that __init__.py file (or copy it as i indicated earlier). If yes, check that your package folder is in Python's path.

[punchnami]

In @edwin9610 's case, since the __init__.py file is present in the pyrealsense2 folder, i think the problem is that /usr/local/lib/python3.6 is not in the path (the list you provided).

@punchnami do you have the package installed somewhere ? Check that the folder contains that __init__.py file (or copy it as i indicated earlier). If yes, check that your package folder is in Python's path.

Thank you @persalteas , I will check it out!

[christianschmitzuni]

After "sudo cp ~/librealsense/wrappers/python/pyrealsense2/init.py /usr/lib/python3.6/dist-packages/pyrealsense2/" and then copying the additional 6 .so files into /usr/lib/python3.6/dist-packages/pyrealsense2/ aswell

When using import pyrealsense2 I still get the following error:

import pyrealsense2
Traceback (most recent call last):
File "", line 1, in
File "/usr/lib/python3.6/dist-packages/pyrealsense2/init.py", line 2, in
from .pyrealsense2 import *
ModuleNotFoundError: No module named 'pyrealsense2.pyrealsense2'

Anything that I am missing?