Python example: Hardy Cross method for pipe networks

I teach a class called Water Resources Engineering at the University of Colorado Boulder, and I have often added in examples where students use Python to perform the calculations.  For those of you who are new to programming, you might get a kick out of this example since it goes through an entire procedure of how to solve an engineering problem using Python, and the numpy library.  The example is two YouTube videos embedded below! The best way to watch them, though, is in full screen, which you can get to by clicking the name of the video, opening up a new YouTube tab in your browser.

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