This page details how to implement computer language interpreters and specifically constructs an interpreter for a Scheme dialect of Lisp using Python. The author showcases the simplicity and consistency of Scheme syntax compared to other programming languages like Java and Python. The article covers the syntax and semantics of Scheme programs, introduces a simplified Lispy Calculator language before the near-full Scheme language, explains the parsing and execution process of a language interpreter, and provides the code for evaluation in Lispy. The author also presents the concept of environments for managing variables and expands the Lispy language with new special forms.
https://www.norvig.com/lispy.html