PyDL consists of Python replacements for functions that are part of the IDL built-in library or part of astronomical IDL libraries. The emphasis is on reproducing results of the astronomical library functions. Only the bare minimum of IDL built-in functions are implemented to support this.

There are four astronomical libraries targeted:

* idlutils: a general suite of tools heavily used by SDSS. * Goddard utilities: The IDL Astronomy User's Library, maintained by Wayne Landsman and distributed with idlutils. * idlspec2d: tools for working with SDSS, BOSS and eBOSS spectroscopic data. * photoop: tools for working with SDSS imaging data.

This is the Python 3 version of the package.