Windows Installing Guide for PandExo

Created by J. N. van Haastere (Physics and Astronomy Bachelorstudent) Univesity of Amsterdam and VU University Amsterdam

Step 1

You may want to uninstall older python versions to prevent troubles along the way.

Step 2

Download most recent Anaconda version (tested with Python 3.6.4 64 bit)

Step 3

Install Anaconda as main python and add to path environment


If succesfully installed you can open CMD and type >>python and >>quit() to check version

Step 5

Follow PandExo Installation guide in getting files

  • get pandeia_data (pandeia_data-1.2.tar.gz)

  • get pysynphot_data (synphot5.tar.gz)

  • get PandExo github folder (

Step 6

Open in your favorite text editor (eg. Notepad++) and read through installation steps. Below we will follow these steps but with Windows commands.

Step 7: Setting Reference Data

Using an achiver (eg. Winrar, 7Zip) extract Pandeia and Pysynphot data in two seperate folders.


Check the variable names

echo 'export VARIABLE_NAME = ".."'

In case nothing changes these should be PYSYN_CDBS & pandeia_refdata

Set these in Windows environment variables / registry using SETX. Open CMD or Anaconda Prompt and run:

SETX PYSYN_CDBS 'C:/Users/USERNAME/pysynphot_data'
SETX pandeia_refdata 'C:/Users/USERNAME/pysynphot_data'

You can check this step by opening a new CMD and run > SET

Step 7: Installing needed Packages

Add conda channel, in CMD:

conda config --add channels

Check needed packages, at the moment:

numpy synphot joblib scipy astropy==2.0.2 pyfftw pysynphot photutils sphinx=1.5.6 bokeh=0.12.6

All but Pyfftw can be installed using:

conda install PACKAGE


pip install PACKAGE

If they fail check in the error if you are missing a certain .dll or look online.

For Pyfftw get a prebuiled wheel from here.

Get a matching cp36-cp36 for your python version. For Python 3.6.4 64-bit I used:

  • pyFFTW-0.10.5.dev0+d45d7fe-cp36-cp36m-win_amd64.whl

Navigate to download folder and install

cd 'C:\Users\USERNAME\Downloads'
pip install pyFFTW-0.10.5.dev0+d45d7fe-cp36-cp36m-win_amd64.whl

With your fingers crossed, install PandExo Engine

pip install pandexo.engine

Probabily fail, look what I/you missed and try again. Troubleshooting here.

Step 8: Run Test

Navigate to your pandexo-master and run the run_test. Check in the installation guide on the exact expected output.

cd '...'

Congrats on being persevering/stubborn enough to get it on to work on Windows! There are some test Jupyter files to try out in pandexo-master/notebooks