Fix manifpy test dependency

[Giulero]

In order to check the correctness of the computations, I wrote some tests against Manif.

It seems manifpy cannot be installed via PyPI. However, they provide installation instruction in https://github.com/artivis/manif/blob/devel/docs/pages/python/Quick-start.md.

Although I can install the library using conda on my system, I'm not able to move the same logic in a workflow. manifpy seems to be installed but it is not found:

ModuleNotFoundError: No module named 'manifpy'

Am I doing something wrong?

@traversaro @GiulioRomualdi do you have any suggestions?

[traversaro]

@Giulero the workflow link is not pointing to the intended location I guess.

[Giulero]

Ops! Wrong copy-paste Now should be ok!

[traversaro]

So, the situation is a bit confusing as you currently have installed three python interpreter:

• The one that is installed via apt in the system (1)
• The one installed via conda as a dependency of manifpy (2)
• The one that is installed via actions/setup-python (3)

So, first of all let's decide which Python we want to use. As we want to install manifpy via conda-forge, I guess we want to install the python installed via conda (otherwise we could be using two different incompatible versions), i.e. (2). As a general note, I do not think there are many reason to use the Python installed via actions/setup-python (i.e. 3). If we want to use conda, let's try to remove the installation of an additional python via actions/setup-python, and let's try again. To make sure of which python are you using, you can run which python.

Furthermore, notice that if you want to use conda, you should run all the following steps with shell: bash -l {0}, or set it as default shell, see https://github.com/conda-incubator/setup-miniconda#use-a-default-shell and https://github.com/conda-incubator/setup-miniconda#important.

[Giulero]

Thanks @traversaro! I had to add a few more lines and now the action proceeds :)

Closing!