Hy is a dialect of the Lisp programming language designed to interact with Python by translating s-expressions into Python's abstract syntax tree (AST). Hy was introduced at Python Conference (PyCon) 2013 by Paul Tagliamonte. Lisp allows operating on code as data (metaprogramming), thus Hy can be used to write domain-specific languages.
Similar to Kawa's and Clojure's mappings onto the Java virtual machine (JVM), Hy is meant to operate as a transparent Lisp front-end for Python. It allows Python libraries, including the standard library, to be imported and accessed alongside Hy code with a compilingThe term "compiled" may apply to expressing Hy code in Python's AST or converting that AST into bytecode, the latter being dependent on the specific Python interpreter used and not Hy. step where both languages are converted into Python's AST.Hy is tested on Python 2.7, 3.4 through 3.6, and PyPy.
Example code From the language documentation: => (print "Hy!") Hy! => (defn salutationsnm [name] (print (+ "Hy " name "!"))) => (salutationsnm "YourName") Hy YourName!
See also Common Lisp Clojure Kawa (Scheme implementation) CLPython
Notes
References
External links
Documentation Video of 2014 PyCon talk