chessdata-pyclient

Python library for interacting with foxden / CHESS data services

Installation

1. In an environment of your choosing, run pip install chessdata-pyclient
2. Set the environment variable $REQUESTS_CA_BUNDLE to a path to a CA bundle to use (for SSL).
3. Set $PATH to include the path to a foxden CLI executable (so that chessdata-pyclient can run foxden token create <scope>)
4. Set $KRB5CCNAME to be the full path to a file containing a valid kerberos ticket. It is up to the user to make sure the ticket is not expired.

Examples

• Search the CHESS metadata database for records on tomography scans taken at ID3A:

  from chessdata import query
  records = query('{"beamline":"3a" "technique":"tomography"}')

• Search the CHESS spec scans database for all scan records from the "pi-nnnn-x" BTR:

  from chessdata import query
  records = query('{"btr": "pi-nnnn-x"}', url='https://foxden-scans.classe.cornell.edu:8390')