The issue of dependency installation for open3d packages

[Rax0913]

When I run ''pip install open3d==0.9" in cmd, there is a error.
"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)"
It seems that the 0.1.3 version of comm cannot be installed in the Python 2.7 environment, I have also tried the "pip install comm==0.1.3", but it still reported an error.
"ERROR: Could not find a version that satisfies the requirement comm==0.1.3 (from versions: 0.0.1)
ERROR: No matching distribution found for comm==0.1.3".
How can I solve this problem?

[SamoaChen]

it seems like ipywidgets version sorted by pip to install open3d==0.9 is too new. install an older verion as shown below will resolve the issue
pip install ipywidgets==7.6.3

[ga58lar]

See #43 (comment):
pip install pyrsistent==0.15 open3d==0.9 --no-deps