The core of the code is built on the `ZTFQuery` object inside the `ztfquery.query.py` library.
`ZTFQuery` contains the core tools to:
- access IRSA information (`load_metadata()`),
- download data (`download_data()`)
- retrieve data in your computer (`get_local_data()`)
- vizualize which fields have been observed (`show_gri_fields()`)
A second simpler object `NightSummary` enables to have a summary of what ZTF has observed in a given night. It also have the `show_gri_fields()` vizualization method.
Have fun !