lazy imports filter sees the same thing for `from x import y` and `from .x import y`

[pablogsal]

The lazy imports filter gets the unresolved module name for relative imports, so lazy from target import VALUE and lazy from .target import VALUE look identical to the callback even though they resolve to different modules. In this repro both filter calls print ('pkg.runner', 'target', ('VALUE',)), so the filter cannot tell the absolute and relative cases apart.

$ tmpdir=$(mktemp -d)
$ mkdir -p "$tmpdir/pkg"
$ cat > "$tmpdir/target.py" <<'PY'
VALUE = 'absolute'
PY
$ cat > "$tmpdir/pkg/__init__.py" <<'PY'
PY
$ cat > "$tmpdir/pkg/target.py" <<'PY'
VALUE = 'relative'
PY
$ cat > "$tmpdir/pkg/runner.py" <<'PY'
import sys

def my_filter(importer, name, fromlist):
    print((importer, name, fromlist))
    return True

sys.set_lazy_imports_filter(my_filter)
lazy from target import VALUE as absolute_value
lazy from .target import VALUE as relative_value
PY
$ PYTHONPATH="$tmpdir" ./python -c 'import pkg.runner'
('pkg.runner', 'target', ('VALUE',))
('pkg.runner', 'target', ('VALUE',))

Linked PRs

• gh-148110: Resolve lazy import filter names for relative imports #148111

[pablogsal]

CC @1st1

[picnixz]

Is the same as #148026?