Open3d: JVisualizer python27 AttributeError: 'module' object has no attribute 'PointCloud'

[jccurtis]

Describe the bug
The pip installed jupyter visualization is broken in python27.

To Reproduce
Steps to reproduce the behavior:

1. Jupyter Notebook Visualizaiton Example from here:

import numpy as np
import open3d as o3
from open3d import JVisualizer

pts_path = "examples/TestData/fragment.ply"
fragment = o3.read_point_cloud(pts_path)
visualizer = JVisualizer()
visualizer.add_geometry(fragment)
visualizer.show()

1. See error:

AttributeError                            Traceback (most recent call last)
<ipython-input-37-4d6d5090de1b> in <module>()
      6 fragment = o3.read_point_cloud(pts_path)
      7 visualizer = JVisualizer()
----> 8 visualizer.add_geometry(fragment)
      9 visualizer.show()

/home/<OMITTED>/.local/lib/python2.7/site-packages/open3d/j_visualizer.pyc in add_geometry(self, geometry)
     73         #       so we keep track of self.geometries and self.geometry_jsons.
     74         self.geometries.append(geometry)
---> 75         self.geometry_jsons = [geometry_to_json(g) for g in self.geometries]
     76 
     77     def clear(self):

/home/<OMITTED>/.local/lib/python2.7/site-packages/open3d/j_visualizer.pyc in geometry_to_json(geometry)
     35     """Convert Open3D geometry to Json (Dict)"""
     36     json = dict()
---> 37     if isinstance(geometry, o3.PointCloud):
     38         json['type'] = 'PointCloud'
     39         # TODO: do not flatten

AttributeError: 'module' object has no attribute 'PointCloud'

Expected behavior
A pointcloud to be plotted without an error. o3 appears to be imported without the PointCloud class in its namespace. Removed this line in the source resolves the issue:

     """Convert Open3D geometry to Json (Dict)"""
     json = dict()
     # if isinstance(geometry, o3.PointCloud):
     if True:
         json['type'] = 'PointCloud'
         # TODO: do not flatten

Screenshots
None

Environment (please complete the following information):

• OS: Ubuntu 18.04
• Python version: 2.7
• Open3D version: 0.6.0.0 (from pypi)
• Is this remote workstation?: no
• How did you install Open3D?: pip

Additional context
This doesn't occur in python36

[germanros1987]

We are dropping support for python 2. Sorry.

[dmaugis]

same with python 3.6

AttributeError Traceback (most recent call last)
in ()
6 fragment = o3d.io.read_point_cloud(pts_path)
7 visualizer = JVisualizer()
----> 8 visualizer.add_geometry(fragment)
9 visualizer.show()

2 frames
/usr/local/lib/python3.6/dist-packages/open3d/j_visualizer.py in add_geometry(self, geometry)
73 # so we keep track of self.geometries and self.geometry_jsons.
74 self.geometries.append(geometry)
---> 75 self.geometry_jsons = [geometry_to_json(g) for g in self.geometries]
76
77 def clear(self):

/usr/local/lib/python3.6/dist-packages/open3d/j_visualizer.py in (.0)
73 # so we keep track of self.geometries and self.geometry_jsons.
74 self.geometries.append(geometry)
---> 75 self.geometry_jsons = [geometry_to_json(g) for g in self.geometries]
76
77 def clear(self):

/usr/local/lib/python3.6/dist-packages/open3d/j_visualizer.py in geometry_to_json(geometry)
35 """Convert Open3D geometry to Json (Dict)"""
36 json = dict()
---> 37 if isinstance(geometry, o3.PointCloud):
38 json['type'] = 'PointCloud'
39 # TODO: do not flatten

AttributeError: module 'open3d' has no attribute 'PointCloud'

[vik2rr]

Same error python 3.7.3

[jccurtis]

How did you install the package? Which OS?

[dmaugis]

Google Colab

!pip install open3d

import numpy as np
import open3d as o3d
from open3d import JVisualizer

pts_path = "j001.ply"
fragment = o3d.io.read_point_cloud(pts_path)
visualizer = JVisualizer()
visualizer.add_geometry(fragment)
visualizer.show()

[dmaugis]

same on a local Jupyter, ubuntu 16

---

AttributeError Traceback (most recent call last)
in
6 fragment = o3d.io.read_point_cloud(pts_path)
7 visualizer = JVisualizer()
----> 8 visualizer.add_geometry(fragment)
9 visualizer.show()

/usr/local/lib/python3.5/dist-packages/open3d/j_visualizer.py in add_geometry(self, geometry)
73 # so we keep track of self.geometries and self.geometry_jsons.
74 self.geometries.append(geometry)
---> 75 self.geometry_jsons = [geometry_to_json(g) for g in self.geometries]
76
77 def clear(self):

/usr/local/lib/python3.5/dist-packages/open3d/j_visualizer.py in (.0)
73 # so we keep track of self.geometries and self.geometry_jsons.
74 self.geometries.append(geometry)
---> 75 self.geometry_jsons = [geometry_to_json(g) for g in self.geometries]
76
77 def clear(self):

/usr/local/lib/python3.5/dist-packages/open3d/j_visualizer.py in geometry_to_json(geometry)
35 """Convert Open3D geometry to Json (Dict)"""
36 json = dict()
---> 37 if isinstance(geometry, o3.PointCloud):
38 json['type'] = 'PointCloud'
39 # TODO: do not flatten

AttributeError: module 'open3d' has no attribute 'PointCloud'

[vik2rr]

How did you install the package? Which OS?

conda install -c open3d-admin open3d
Win 10

[hanamizukigakki]

same error with python3.6.8, install open3d from source

[kkiselev]

Same error on python 3.6.8. Installed using pip install open3d

[dkotsur]

I have the same error on python 3.7.4 using pip install open3d on mac.

[vuptran]

pip install open3d-python fixes the "no attribute 'PointCloud'" problem for me. I'm using Ubuntu 16.04 and python36.

[HowcanoeWang]

Same Error on Win10 Python3.7 by conda install -c open3d-admin open3d

[cudawarped]

Monkey patching with
o3.PointCloud = o3.geometry.PointCloud
should solve the issue until the next release.

I haven't had any issues with this patch but I cannot guarantee that it won't cause any errors if other parts of the lib are still relying on o3.PointCloud.

[Jake-zhi]

Same Error on Win10 Python3.6 by conda install -c open3d-admin open3d

[Jake-zhi]

import numpy as np
import open3d as o3
from open3d import JVisualizer

pts_path = "D:/project/python/open3d/surces/TestData/fragment.ply"
fragment = o3.read_point_cloud(pts_path)
visualizer = JVisualizer()
visualizer.add_geometry(fragment)
visualizer.show()

AttributeError: module 'open3d' has no attribute 'read_point_cloud'

what it mean??

[germanros1987]

@yxlao could you take a look at this?

[albertotono]

Similar issue:
I tried installing in Linux Ubuntu 20 / Anaconda env / with conda install -c open3d-admin open3d with pip install open3d-python and !pip install open3d but nothing same error with read_point_cloud. also when I do python -c "import open3d as o3d" nothing happen. Any help?