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Python Instructions

Basic guide to running our scripts

To run any of our Python scripts, you will first need to have Python installed. If you have ArcGIS installed, you should already have a copy of Python installed. If not, Python is a free, open source programming environment which can be downloaded from the official website:

The scripts were developed and tested with Python version 3.9 on Windows 10.

  • After you have installed Python, download the .py script file to any folder on your computer.

  • Check the README.txt file, if present, for an introduction and more information about running the specific script and any options. The .sig file is not needed. It is a signature file which can be used to verify authorship of the script.

  • Double click the .py script on your computer.

  • A command prompt window should pop-up and you should see a short introduction to the script.

    • If not, and you see a white window with Run in the submenu at the top, click Run and then Run Module.

    • If something else happens, Python may not be in your system's Environment Variables or .py files may not be associated with Python.

    • Your Python installation may be in a folder such as C:\Users\(YOUR USERNAME)\AppData\Local\Programs\Python\Python39

    • If you have ArcGIS installed, search the installation folder for python.exe to find the path to it.

    • See this page for methods on adding Python to the Environment Variables.

    • You may also need to manually select python.exe for running .py files on Windows.

  • Next, the script may prompt you for options, path(s), or settings.

  • As the script runs, it may track progress and any errors and report them to you.

  • After it has finished, it will notify you and you may review the terminal output, or close the window.

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