Python environment's problem

[michaelczhou]

Hi: Your job looks like awesome.When I run "roslaunch semantic_slam semantic_mapping.launch",I met some wrong.

[ INFO] [1539334068.008475645]: Semantic octomap generator [max fusion]
Traceback (most recent call last):
  File "/home/zc/catkin_car/src/semantic_slam-master/semantic_cloud/src/semantic_cloud.py", line 21, in <module>
    from color_pcl_generator import PointType, ColorPclGenerator
  File "/home/zc/catkin_car/devel/lib/python2.7/dist-packages/color_pcl_generator/__init__.py", line 35, in <module>
    exec(__fh.read())
  File "<string>", line 1, in <module>
ImportError: cannot import name 'PointType'

Thanks.

[jsdd25]

@michaelczhou , Hi, I have the same problem as you. Did you fix it? Thanks!

[michaelczhou]

@jsdd25 make sure your python's environment is belong to ROS ,my mistake is forgetting to close annoconda. if this can't work ,you can try to reinstall ROS.

[harnix]

@jsdd25 I ran into the same issue because I had multiple python versions installed. This was solved by specifying the right python version to run the code within semantic_cloud.py ros node. Hope that helps

[zouyajing]

@jsdd25 make sure your python's environment is belong to ROS ,my mistake is forgetting to close annoconda. if this can't work ,you can try to reinstall ROS.

Hi. I have both python2.7 and 3.5. I have tried two ways but both not work for me.

1. #!/usr/bin/env python2.7 or 3.5
2. catkin build --cmake-args -DPYTHON_VERSION=3.5 Can you tell me more details about solving this problem ?

[zouyajing]

@harnix Sorry. can you tell me more detail about avoiding this error ? I am a little confused about the python environment. Thanks.

[codieboomboom]

For whoever running into the same problem, pls try delete the content of the color_pcl_generator/init.py in the include folder (make it empty .py file)

[reem90]

@AnhTuDo1990 What do you mean by empty? the content of the file or the name of the file? @all I am using python 3.8, I changed the first line in the semantic_labelling.py to be #!/usr/bin/env python3.8 and I got the following error

ImportError: cannot import name 'PointType' from partially initialized module 'color_pcl_generator' (most likely due to a circular import) (/home/hme/catkin_ws/devel/lib/python3/dist-packages/color_pcl_generator/__init__.py)

did any one solve it?

[codieboomboom]

@reem90 make a init.py file with nothing inside

[52nogamenolife]

@michaelczhou I have the same importerror , how did you solve it? I have tried to make an empty init.py, but i didn't work File "/home/lx/work/semantic_slam-master/slam/src/semantic_cloud/src/semantic_cloud.py", line 22, in from color_pcl_generator import PointType, ColorPclGenerator ImportError: cannot import name 'PointType' what should I do? Many thanks!

[russelldj]

I'm lacking context, but for future reference, I believe the correct file is __init__.py not init.py.