[Python] Add __getattr__ to pyarrow.compute for typing

[randolf-scholz]

Describe the enhancement requested

When type-checking with pyright, the module pyarrow.compute raises tons of errors of the form

error: "sum" is not a known attribute of module "pyarrow.compute" (reportAttributeAccessIssue)

One can use the useLibraryCodeForTypes=false option to suppress these, but it's not configurable on a per-module basis.

The problem is that these are dynamically generated via

arrow/python/pyarrow/compute.py

Line 336 in c3aad6a

_make_global_functions()

A workaround until stubs are available would be to add a module-level __getattr__ function:

if TYPE_CHECKING:
    def __getattr__(self, name: str, /) -> Any: ...

See: microsoft/pyright#3909 (comment)

Component(s)

Python

[zen-xu]

please install pyarrow-stubs

pip install 'pyarrow-stubs>=17.2'