The py-bindings were not successfully generated

[zhe-beginner]

The py-bindings were not successfully generated

[Tass0sm]

I am also getting this error

[zhe-beginner]

The latest progress has found that it may be due to the high version of the zipp Python package .When we run

./install-ompl-ubuntu.sh –app

The system defaults to installing zipp 3.17.0. The relevant statement shows[https://github.com/jaraco/zipp/issues/100]
Zip=3.17.0 and zip=3.16.0 are not supported Python>=3.8,

So I uninstalled zip 3.17.0 using

sudo - H pip3 uninstall zipp

and installed zip 3.15.0 using

sudo - H pip3 install zip==3.15.0

The above issue was resolved, but new issues arose.

When I run

make -j 1 update_bindings

In the omplapp/omplap-1.6.0-Source/build/Release directory, the relevant logs files under the command of omplapp/omplap-1.6.0-Source/build/Release are as follows:

Traceback (most recent call last):
File "/home/l/omplapp/omplapp-1.6.0-Source/ompl/py-bindings/generate_bindings.py", line 41, in
from pygccxml import declarations
File "/usr/local/lib/python3.8/dist-packages/pygccxml/init.py", line 45, in
import importlib_metadata as metadata
File "/usr/local/lib/python3.8/dist-packages/importlib_metadata/init.py", line 18, in
from . import _adapters, _meta, _py39compat
File "/usr/local/lib/python3.8/dist-packages/importlib_metadata/_meta.py", line 1, in
from typing import Protocol
ImportError: cannot import name 'Protocol'

Relevant information display, Protocol can be used in Python3.8 through from typing import Protocol .
It is really strange.
I don't know where the problem occurred during the installation process, and I look forward to receiving your help.

[Tass0sm]

I found using make -n update_bindings that it was running pypy3 to generate the bindings. pypy3 didn't seem to work on my system so I reran cmake as recommended to disable using pypy3.

cd build/Release
cmake -DCMAKE_DISABLE_FIND_PACKAGE_pypy=ON ../..

Then I removed python 2 from my system and also changed the shebang in generate_bindings.py to be #!/usr/bin/env python3 instead of #!/usr/bin/env python

I'll post another comment if I find why pypy3 doesn't work

[zhe-beginner]

Thank you for your suggestion.
Based on your suggestion, in install-ompl-ubuntu.sh file, I changed

cmake ../.. -DPYTHON_EXEC=/usr/bin/python${PYTHONV}

to

cmake -DCMAKE_DISABLE_FIND_PACKAGE_pypy=ON ../.. -DPYTHON_EXEC=/usr/bin/python${PYTHONV}

and did not remove python 2，
and also changed the shebang in generate_bindings.py to be /usr/bin/env python3 instead of /usr/bin/env python.

Then run ./install-ompl-ubuntu.sh –app
Some other problems occurred, but have been resolved by Added try/except for string SpecificParam
and Ubuntu20.04安装OMPL安装指南.

Although your question of "why pypy3 doesn't work" is still not solved, the gui can at least be used.

Your discovery helped me a lot, thank you again,
I will post my latest findings on the issue here.

[zkingston]

If you are compiling directly from the installation script, can you please use the latest commit on this git repository instead? There are some documented issues with Python binding generation using the install script. Let me know if errors persist.

[Tass0sm]

I encountered this particular issue on both 1.6 and the latest commit I believe. After resolving this error, I did have to use the latest commit due to the issue fixed by #980. While compiling the latest commit, I also encountered the following error:

CMake Error in CMakeLists.txt:
        Imported target "Boost::unit_test_framework" includes non-existent path
      
          "/include"
      
        in its INTERFACE_INCLUDE_DIRECTORIES.  Possible reasons include:
      
        * The path was deleted, renamed, or moved to another location.
      
        * An install or uninstall procedure did not complete successfully.
      
        * The installation package was faulty and references files it does not
        provide.

I didn't have time to find the root cause, so I just created a symlink from /include to /usr/include and there were no more issues after that.

[sakjdas]

make -n update_bindings

Thank you for your suggestion. Based on your suggestion, in install-ompl-ubuntu.sh file, I changed

cmake ../.. -DPYTHON_EXEC=/usr/bin/python${PYTHONV}

to

cmake -DCMAKE_DISABLE_FIND_PACKAGE_pypy=ON ../.. -DPYTHON_EXEC=/usr/bin/python${PYTHONV}

and did not remove python 2， and also changed the shebang in generate_bindings.py to be /usr/bin/env python3 instead of /usr/bin/env python.

Then run ./install-ompl-ubuntu.sh –app Some other problems occurred, but have been resolved by Added try/except for string SpecificParam and Ubuntu20.04安装OMPL安装指南.

Although your question of "why pypy3 doesn't work" is still not solved, the gui can at least be used.

Your discovery helped me a lot, thank you again, I will post my latest findings on the issue here.

Hi, can I ask you how do you solve the protocol problem? because I did what you have said here, but it does't work. Have you done any other steps? Thanks in advance!

[vickyliuliu]

Hi, I encountered the same issue as @sakjdas , i.e. cannot import Protocol from typing. Has anybody figured out how to resolve this? FYI I've installed zipp 3.15.0

[Tass0sm]

I've installed zipp 3.15.0

What python version are you using?

[vickyliuliu]

I'm using Python 3.8.10

[zkingston]

Consolidating with #1102 - please move discussion there.