adding get_link() method and get-link endpoint

[andreworg]

Hi all

I forked the repo and added a get_link() method and get-link endpoint to fetch a single link by id:

master...andreworg:python-shaarli-client:andrew-get_link

I needed this for a project of mine (see shaarli/Shaarli#1943); I think it also serves as partial workaround for #34 (you can use get_link() to fetch all data for an existing record, then use put_link() to update the record).

I'm writing this here before submitting a PR because I have not updated the test suite yet - I'm having trouble with that - and I was wondering what to do.

Thanks

[nodiscc]

Hi @andreworg
I think you should submit your patch (don't forget to update the documentation)
About the tests, I think a simple copy of test_get_links_uri https://github.com/shaarli/python-shaarli-client/blob/master/tests/client/test_v1.py#L141 should be fine (just replace .get_links with .get_link)

We can start from there