msv4-utils

Lightweight utilities for reasoning about Measurement Set v4. Core functionality depends only on the Python standard library.

Installation

pip install msv4-utils

Usage

Infer the MSv4 backend from a URI

from msv4_utils import infer_backend, MSv4Backend

backend = infer_backend("/path/to/data.ms")
if backend == MSv4Backend.CASA_TABLE:
    # open with xarray-ms
    ...
elif backend == MSv4Backend.ZARR:
    # open with xarray
    ...
elif backend == MSv4Backend.MEERKAT:
    # open with xarray-kat
    ...

MSv4 type constants

from msv4_utils.msv4_types import VISIBILITY_XDS_TYPES

xds_type = xds.attrs["type"]
if xds_type in VISIBILITY_XDS_TYPES:
    print("interferometric data")

Development

uv sync
uv run pytest tests