DeprecationWarning: SelectableGroups dict interface

[jclerman]

When running pytest on a project that includes rdflib as a dependency, I am seeing the following warning:

<my venv path>/lib/python3.7/site-packages/rdflib/plugins/sparql/__init__.py:52
  <my venv path>/lib/python3.7/site-packages/rdflib/plugins/sparql/__init__.py:52: DeprecationWarning: SelectableGroups dict interface is deprecated. Use select.
    for ep in all_entry_points.get(PLUGIN_ENTRY_POINT, []):

Looks like the problematic code is lines 50 onward, in rdflib/plugins/sparql/__init__.py. To avoid the deprecation warning, it'd be better to use the new interface if it's available, and only call the deprecated one if necessary. My suggestion (I'm just changing the if/elif/else conditions and adding an "else" condition which should never be reached; the remaining code is unchanged from the original):

all_entry_points = entry_points()
if hasattr(all_entry_points, 'select') and callable(all_entry_points.select):
    for ep in all_entry_points.select(group=PLUGIN_ENTRY_POINT):
        CUSTOM_EVALS[ep.name] = ep.load()
elif isinstance(all_entry_points, dict):
    # Prior to Python 3.10, this returns a dict instead of the selection interface
    for ep in all_entry_points.get(PLUGIN_ENTRY_POINT, []):
        CUSTOM_EVALS[ep.name] = ep.load()
else:
    raise RuntimeError("entry_points() returned an object lacking either a select() method or a Dict interface")

[jclerman]

Update:

Looks like the following line triggers the warning in rdflib 6.1.1, under python 3.7:

from rdflib.plugins.sparql.parser import parseUpdate

When running that with python3.7 -W error, a stack trace is generated showing the warning.

[aucampia]

thanks for the info @jclerman - sorry I accidentally deleted the comment asking for it.