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).[3][4] Hy was introduced at Python Conference (PyCon) 2013 by Paul Tagliamonte.[5] Lisp allows operating on code as data (metaprogramming), thus Hy can be used to write domain-specific languages.[6]
Hy logo - Cuddles the cuttlefish
| |
| Paradigm | Multi-paradigm: procedural, functional, object-oriented, meta, reflective, generic |
|---|---|
| Family | Lisp |
| Designed by | Paul Tagliamonte |
| Developers | Core team |
| First appeared | 2013; 11 years ago (2013) |
| Stable release |
0.29.0[1] |
| Preview release | |
| Scope | lexical, optionally dynamic[citation needed] |
| Platform | IA-32, x86-64 |
| OS | Cross-platform |
| License | MIT-style |
| Filename extensions | .hy |
| Website | hylang |
| Influenced by | |
| Kawa, Clojure, Common Lisp | |
Similar to Kawa's and Clojure's mappings onto the Java virtual machine (JVM),[7][8] Hy is meant to operate as a transparent Lisp front-end for Python.[9] It allows Python libraries, including the standard library, to be imported and accessed alongside Hy code with a compiling[note 1] step where both languages are converted into Python's AST.[note 2][10][11][12]
From the language documentation:[13]
=> (print "Hy!")
Hy!
=> (defn salutationsnm [name] (print (+ "Hy " name "!")))
=> (salutationsnm "YourName")
Hy YourName!
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