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Project description
Client for CTA Data Download Service at Swiss CTA DC
Disclaimer
This is a prototype development only for Swiss CTA DC. Please report bugs here, and for any details please inquire the CTAO CH DC management.
Purpose
CTA data are/will be stored at CTAO-CH data center at CSCS. These data should be accessible for selected external users. In addition, these files should be available within interactive analysis platform at CSCS. This client presents an API access to these services and data.
Installation
$ pip install 'ctadata>=0.1.14'
Usage from within CTA CSCS JupyterHub platform
From within CTA CSCS JupyterHub platform, selected authorized users are able to access the "data download service", like so:
import ctadata
for url in ctadata.list_dir("cta/DL1/20241114/v0.1/"):
if 'datacheck' not in url and '.0100' in url and '11111' in url:
print("stored", ctadata.fetch_and_save_file(url)/1024/1024, "Mb")
print("found keys", h5py.File(url.split("/")[-1]).keys())
From outside (possibly another jupyterhub)
You need to get yourself a jupyterhub token, it will be used to authenticate to the download service.
If you are in the session, navigate to the hub control panel this way:
Request a token:
The rest is similar to the previous case:
import os
os.environ["CTADS_URL"] = "DATA-DISTRIBUTING-JUPYTERHUB/services/downloadservice/"
os.environ["JUPYTERHUB_API_TOKEN"] = "INSERT-YOUR-TOKEN-HERE"
for url in ctadata.list_dir("cta/DL1/20241114/v0.1"):
if 'datacheck' not in url and '.0100' in url and '11111' in url:
print("stored", ctadata.fetch_and_save_file(url)/1024/1024, "Mb")
print("found keys", h5py.File(url.split("/")[-1]).keys())
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