pip install open3d==0.9 failed

[ZOUJIASHUAI]

pip install open3d==0.9

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 Please upgrade your Python as Python 2.7 is no longer maintained.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.
Defaulting to user installation because normal site-packages is not writeable
Collecting open3d==0.9
Using cached open3d-0.9.0.0-cp27-cp27mu-manylinux1_x86_64.whl (4.9 MB)
Collecting ipywidgets
Using cached ipywidgets-7.8.1-py2.py3-none-any.whl (124 kB)
Requirement already satisfied: numpy in /usr/lib/python2.7/dist-packages (from open3d==0.9) (1.13.3)
Collecting notebook
Using cached notebook-5.7.16-py2.py3-none-any.whl (9.6 MB)
Collecting widgetsnbextension
Using cached widgetsnbextension-3.6.6-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) (from versions: 0.0.1)
ERROR: No matching distribution found for comm>=0.1.3 (from ipywidgets->open3d==0.9)

[ZOUJIASHUAI]

sloved by #32