Installation

Basic Install

pip install numpy-stl

This installs numpy-stl with its required dependencies (NumPy and python-utils).

Optional Speedups

For faster ASCII STL parsing, install with the fast extra:

pip install numpy-stl[fast]

This installs the speedups package, a Cython-compiled extension that accelerates ASCII file I/O. The library works identically without it – pure Python is the default.

Requirements

• Python 3.10 or later

• NumPy (1.x or 2.x)

• python-utils >= 3.4.5

Development Install

See the Contributing Guide for development setup instructions.