jsonschema 4.4.0 does not provide the extra 'isoduration'

Question

So I'm trying to run some piece of code and keep getting the following error:

File "/opt/conda/lib/python3.8/site-packages/pkg_resources/__init__.py", line 770, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'isoduration; extra == "format"' distribution was not found and is required by jsonschema

However, after running

pip uninstall -y jsonschema && pip install -U jsonschema && pip install jsonschema[isoduration]

I get

Requirement already satisfied: jsonschema[isoduration] in /opt/conda/lib/python3.8/site-packages (4.4.0)
  WARNING: jsonschema 4.4.0 does not provide the extra 'isoduration'

and surely, running my code again I get the same error message as before.

I tried:

• pip install isoduration, but different format showed up as missing
• hard removing jsonschema with rm -rf ...
• installing jsonschema==3.2.0 as it supposedly worked for a friend of mine

I'm very confused with what's going on here, any help would be appreciated.

Answer 1

I think you should install isoduration,

• https://pypi.org/project/isoduration/ ,

and/or use 'format' install extra. From the docs (emphasis mine):

There are a number of default checkers that FormatCheckers know how to validate. Their names can be viewed by inspecting the FormatChecker.checkers attribute. Certain checkers will only be available if an appropriate package is available for use. The easiest way to ensure you have what is needed is to install jsonschema using the format or format-nongpl setuptools extra – i.e.

$ pip install jsonschema[format]