I met this problem when run python setup.py install

[s8088899]

error: Multiple top-level packages discovered in a flat-layout: ['g2o', 'lib', 'script', 'contrib', 'EXTERNAL', 'cmake_modules'].

To avoid accidental inclusion of unwanted files or directories,
setuptools will not proceed with this build.

If you are trying to create a single distribution with multiple packages
on purpose, you should not rely on automatic discovery.
Instead, consider the following options:

1. set up custom discovery (find directive with include or exclude)
2. use a src-layout
3. explicitly set py_modules or packages with a list of names

To find more information, look for "package discovery" on setuptools docs.

[RTae]

@s8088899 I'm also face with this issue same as you. In addition, did your computer arch tech is arm64 ?

[RTae]

@s8088899 I found the solution !! use this script below instead

sudo python3 setup.py install

However, my recommendation you should copy the file name "g2o.cpython-{python-version}-{arch}.so" in g2opy/lib folder into [path-to-python-lib]/lib/python{python-version-which-you-use}/site-package

[MarceloContreras]

Two solutions have gave me good results:

1. Just as @RTae said, you can move manually "g2o.so" to your python package folder. Be careful if you are using a conda enviorement, because then the env itself has its package folder.
2. Downgrade installed setuptool version to 58.2.0 with this command:

pip install setuptools==58.2.0

[s8088899]

Thanks a lot！I already solve this problem by improving the network environment and virtual machine versions.

[robofar]

Package is installed, but when I run conda list | grep g2o why it cannot "see" this package?