Problem with python wrapper build

[fatrybl]

Hello everyone,
i faced a problem with building GTSAM with python wrapper/
What i do:

1. dowloaded repo, mkdir build && cd build
2. cmake -DCMAKE_BUILD_TYPE=Debug -DGTSAM_BUILD_PYTHON=1 -DCMAKE_INSTALL_PREFIX:PATH=$HOME/mark/gtsam_lib/ .. (tried to install to default usr/local/ , same result)
3. make check -j6 . All tested passed 0 errors out of 265
4. make install -j6. All installed , no errors , all is fine
5. Now: make python-install
   and get this:
   
6. make python-test
   and give me this:
   

Im not professional in CMAKE and all the stuff like this, but maybe anyone has an idea what going wrong ?
Additionally, my python does not see gtsam. I cant import it.
I have Linux Mint 20 and Python 3.8.10 installed by default

[ProfFan]

I think we should change the README to advise people to NOT use python-install. As demonstrated in #1075 , the existence of the python-install appears to be rather confusing to first-time users.

@fatrybl I suggest you to install the python toolbox with:

cd <your build folder> # normally <gtsam>/build
pip install --user ./python

As for the error you are seeing, please report back your current operating system and GCC version.

[dellaert]

I love python-install ! What's wrong with it?

[dellaert]

I think the issue - which we should document properly - is that users that don't have install privileges in their regular python build should build gtsam withn a virtualenv or conda environment.

[dellaert]

On Mac, for instance, system python is still 2.7. I also think no one should install in /usr/local

[fatrybl]

@ProfFan thank you for a decision. I used pip install --user ./python and python wrapper has been successfully installed to /home/mark/.local/lib/Python3.8/site-packages/ . My GCC is 9.3.0, Linux Mint 20.3 Cinnamon, kernel 5.4.0-97-generic.
@dellaert Could you please clarify how to install with python-install and proper permissions? sudo make python-install did not help. I dont really want to use any environments as conda or others. Seems like there should be an option to install wrapper to $HOME/.local/lib/Python3.8/site-packages/ as with a method above

[catproof]

I tried everything in the following thread: #714 as well as in this current thread. I am still getting the error listed here when trying to build.

Does anyone have any tips/tricks/advice? Thanks in advance.

[catproof]

@ProfFan @dellaert @fatrybl

[varunagrawal]

If you're getting a PythonConfig.cmake error, that means you most likely don't have the dev files for your interpreter installed. For a vanilla Ubuntu system, that would be apt-get install python3-dev.