Python examples

Observe an explicit CSV target list

The complete source is included below.

python -m nextastro_obs_client.examples.target_list nextastro_obs_client/examples/targets.csv

Reads target_name,ra_hours,dec_deg,filter,seconds,count and executes the rows in order. The supplied CSV has illustrative coordinates; edit it for the observing session. A real failure stops the run and preserves the completed commands in OBS history.

Student extension: Add a results CSV linking each target row to returned exposure IDs and files.

Python source

"""Run explicit coordinates and exposure settings from a CSV."""
import csv
from nextastro_obs_client.examples._common import parser, execute


def run(obs, camera, args):
    with open(args.targets, newline="", encoding="utf-8-sig") as handle:
        for row in csv.DictReader(handle):
            obs.mount.slew(ra_hours=float(row["ra_hours"]), dec_deg=float(row["dec_deg"]))
            for image in camera.expose(seconds=float(row["seconds"]), filter=row["filter"],
                                       count=int(row["count"]), target_name=row["target_name"]):
                print(row["target_name"], image.path)


def main(argv=None):
    p = parser("CSV target list")
    p.add_argument("targets", help="CSV: target_name,ra_hours,dec_deg,filter,seconds,count")
    return execute(p, run, argv)


if __name__ == "__main__":
    main()

Shared argument and session helpers: Example support code.