open3d installation issue

[Surajj4837-th]

I m trying to install this repository for calibration of a Camera with a LiDAR sensor. The open3d installation is not happening and following error is coming:

(isoEnv) suraj@suraj:~$ pip install open3d==0.9.0
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality.
Collecting open3d==0.9.0
Using cached open3d-0.9.0.0-cp27-cp27mu-manylinux1_x86_64.whl (4.9 MB)
Collecting ipywidgets
Using cached ipywidgets-7.8.0-py2.py3-none-any.whl (124 kB)
Collecting numpy
Using cached numpy-1.16.6-cp27-cp27mu-manylinux1_x86_64.whl (17.0 MB)
Collecting notebook
Using cached notebook-5.7.16-py2.py3-none-any.whl (9.6 MB)
Collecting widgetsnbextension
Using cached widgetsnbextension-3.6.5-py2.py3-none-any.whl (1.6 MB)
Collecting traitlets>=4.3.1
Using cached traitlets-4.3.3-py2.py3-none-any.whl (75 kB)
ERROR: Could not find a version that satisfies the requirement comm>=0.1.3 (from ipywidgets->open3d==0.9.0) (from versions: 0.0.1)
ERROR: No matching distribution found for comm>=0.1.3 (from ipywidgets->open3d==0.9.0)

I also tried to upgrading to python3 to get the open3d installation working but in that case the project is not working, so I have to return to python2.

[zhh2005757]

Package comm is needed by ipywidgets, since the latest version of ipywidgets does not support python2 anymore, we need install old version one. I installed version 7.6.2 of ipywidgets, then install open3d 0.9.0 and there is no error output.