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Space Telescope Science Institute

PyRAF is a command language for running IRAF tasks that is based on the Python scripting language. It gives users the ability to run IRAF tasks in an environment that has all the power and flexibility of Python. PyRAF can be installed along with an existing IRAF installation; users can then choose to run either PyRAF or the IRAF CL.

PyRAF is part of the stsci_python package of astronomical data analysis tools, and is a product of the Science Software Branch at the Space Telescope Science Institute.

Release Installation

To download and install the current release version of PyRAF please see instructions on the Astroconda page:

Development Installation

To download and install the latest development version of PyRAF follow these steps. Please only use this version if you have been directed by an STScI representative to do so: