Rule suggestion: Use most specific public import

[chbndrhnns]

I'd like to see ruff convert imports from private modules to imports from the parent package if the member is declared in __all__.

Maybe an example makes it clearer:

# ./client.py
from .myp._private import Member
from .myp._private import OtherMember

assert Member

# ./myp/__init__.py
__all__ = ["Member"]

from ._private import Member

# ./myp/_private.py
class Member: ...

class OtherMember: ...

I consider modules starting with an underscore private. Based on the rule, ruff would fix this snippet to:

# ./client.py
from .myp import Member
from .myp._private import OtherMember

assert Member

# ./myp/__init__.py
__all__ = ["Member"]

from ._private import Member

# ./myp/_private.py
class Member: ...

class OtherMember: ...

[charliermarsh]

Thanks for writing this up! I think it's roughly equivalent to #1107.