zodburi import raises a warning with setuptools 67.3+

[azmeuk]

setuptools has just been released: https://setuptools.pypa.io/en/latest/history.html#v67-3-0

On a clean virtualenv, install zodburi, setuptools==67.3.1 and pytest, and run a dummy test:

def test_foobar():
    import zodburi

This will raise this warning:

________________________________________________________ test_foobar _________________________________________________________

    def test_foobar():
>       import zodburi

test_foobar.py:2:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
../.local/share/virtualenvs/test-sanl/lib/python3.10/site-packages/zodburi/__init__.py:2: in <module>
    from pkg_resources import iter_entry_points
../.local/share/virtualenvs/test-sanl/lib/python3.10/site-packages/pkg_resources/__init__.py:3257: in <module>
    def _initialize_master_working_set():
../.local/share/virtualenvs/test-sanl/lib/python3.10/site-packages/pkg_resources/__init__.py:3231: in _call_aside
    f(*args, **kwargs)
../.local/share/virtualenvs/test-sanl/lib/python3.10/site-packages/pkg_resources/__init__.py:3282: in _initialize_master_working_set
    tuple(dist.activate(replace=False) for dist in working_set)
../.local/share/virtualenvs/test-sanl/lib/python3.10/site-packages/pkg_resources/__init__.py:3282: in <genexpr>
    tuple(dist.activate(replace=False) for dist in working_set)
../.local/share/virtualenvs/test-sanl/lib/python3.10/site-packages/pkg_resources/__init__.py:2803: in activate
    declare_namespace(pkg)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

packageName = 'zc'

    def declare_namespace(packageName):
        """Declare that package 'packageName' is a namespace package"""

        msg = (
            "Implementing implicit namespace packages (as specified in PEP 420) "
            "is preferred to `pkg_resources.declare_namespace`. "
            "See https://setuptools.pypa.io/en/latest/references/"
            "keywords.html#keyword-namespace-packages"
        )
>       warnings.warn(msg, DeprecationWarning, stacklevel=2)
E       DeprecationWarning: Implementing implicit namespace packages (as specified in PEP 420) is preferred to `pkg_resources.declare_namespace`. See https://setuptools.pypa.io/en/latest/references/keywords.html#keyword-namespace-packages

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html

The warning is not raised with setuptools 66

[azmeuk]

Also pkg_resources is being deprecated in the future. Python3.7 support stops on 27 Jun 2023 and then we should probably use importlib and importlib_metadata instead of pkg_resources.

[tseaver]

PR #34 should resolve the pkg_resources API deprecations.

I believe that the namespace deprecation you observed is likely coming from the zc.lockfile package. The whinge there for the long-standing practice of having __init__.py in a namespace package directory isn't anything we can address in zodburi.