PyDL

Introduction

This package 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 Libary, 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 package affiliated with the astropy project and is registered with PyPI.

IDL® is a registered trademark of Harris Geospatial Solutions.

Components

Most of the functionality of PyDL is in sub-packages.

• SDSS Utilities (pydl.pydlutils)
• Goddard Utilities (pydl.goddard)
• SDSS Spectroscopic Data (pydl.pydlspec2d)
• SDSS Imaging Data (pydl.photoop)

Other Notes

• SDSS Spectroscopic Templates with PyDL
• The SDSS Photometric Window Function
• PyDL Changelog
• TODO
• Authors and Credits
• Licenses

Base API

pydl Package

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.

Functions

file_lines(path[, compress])	Replicates the IDL FILE_LINES() function.
median(array[, width, axis, even])	Replicate the IDL MEDIAN() function.
rebin(x, d[, sample])	Resize x to new dimensions given by d.
smooth(signal, owidth[, edge_truncate])	Replicates the IDL SMOOTH() function.
uniq(x[, index])	Replicates the IDL UNIQ() function.

Classes

pcomp(x[, standardize, covariance])	Replicates the IDL PCOMP() function.
PydlException	Base class for exceptions raised in PyDL functions.