[Tutor] Changing spatial reference of shapefiles in folder and exporting to new folder

I want to assemble a script to: 1) input a folder with shapefiles with different coordinate systems, 2) allow the user through a toolbox script to choose a desired coordinate system, and then 3) export all the shapefiles with the new coordinate system to a new folder. So the problem is I don't kno

[Tutor] ArcGIS Create a python script to generate north-facing aspect raster from digital elevation model

Does anyone know how to create a python script to generate an aspect raster from the input elevation in a digital elevation model? I need to specify TWO variables as user parameters: input elevation and output north-facing aspect. I need to create an aspect raster from the input elevation from