Added sconverting Posix to str in get_ontology

[francescalb]

Description:

get_ontology would fail if given a valid pathlib.Posix

Type of change:

• Bug fix.
• New feature.
• Documentation update.

Checklist:

This checklist can be used as a help for the reviewer.

• Is the code easy to read and understand?
• Are comments for humans to read, not computers to disregard?
• Does a new feature has an accompanying new test (in the CI or unit testing schemes)?
• Has the documentation been updated as necessary?
• Does this close the issue?
• Is the change limited to the issue?
• Are errors handled for all outcomes?
• Does the new feature provide new restrictions on dependencies, and if so is this documented?

Comments:

[CasperWA]

Is this true only for PosixPath or can the more general pathlib.Path be used, which will "turn into" a PosixPath on a POSIX system and a Windows-specific Path on a Windows system, etc.?

Maybe one should also instead use the as_uri() instead of casting to a str?

[francescalb]

Is this true only for PosixPath or can the more general pathlib.Path be used, which will "turn into" a PosixPath on a POSIX system and a Windows-specific Path on a Windows system, etc.?

Maybe one should also instead use the as_uri() instead of casting to a str?

Good point. I ha dnot thought about windows. Indeed the whole test fails on windows already in the master ...

[CasperWA]

Approved on the condition that an issue is created for the Windows-issue, which may be solved by implementing a dedicated class that incorporates pathlib.Path as well as URLs.