CadQuery is an intuitive, easy-to-use Python library for building parametric 3D CAD models. It has several goals: Build models with scripts that are as close as possible to how you’d describe the object to a human, using a standard, already established programming language; Create parametric models that can be very easily customized by end users; Output high quality CAD formats like STEP and AMF in addition to traditional STL; Provide a non-proprietary, plain text model format that can be edited and executed with only a web browser