so they aren’t constrained by Python’s limitations. NumPy provides a specialized array type that is optimized to work with machine-native numerical types such as integers or floats.

It is getting harder to find home laser printers, and earlier printer technologies such as dot matrix are almost gone ... printer pins to NumPy matrices Python integration with CUPS using Tea4CUPS ...

He calls it an LED matrix “Paint Toy” because one of the features he’s included lets the user create pixel art like in MS Paint. The 10×8 grid of lights is controlled by a PIC 16F877A.