Hi all, I'm happy to announce the release of Lupa 0.9. http://pypi.python.org/pypi/lupa/0.9 What is Lupa? -------------- Lupa integrates the LuaJIT2 runtime [1] into CPython. It is a rewrite of LunaticPython in Cython with a couple of additional features. The major new feature in this release is coroutine support for Lua functions that follows the Python coroutine protocol (next/send). Examples ---------
from lupa import LuaRuntime lua = LuaRuntime()
lua.eval('1+1') 2
lua_func = lua.eval('function(f, n) return f(n) end')
def py_add1(n): return n+1 lua_func(py_add1, 2) 3
lua_func = lua.eval(''' ... function(N) ... for i=0,N do coroutine.yield(i%2) end ... end ... ''') co = lua_func.coroutine(3) list(co) [0,1,0,1]
Why use it? ------------ It complements Python very well. Lua is a language as dynamic as Python, but LuaJIT compiles it to very fast machine code, sometimes faster than many other compiled languages [2]. The language runtime is extremely small, has a small memory footprint and is carefully designed for embedding. The complete binary module of Lupa, including a statically linked LuaJIT2 runtime, is only some 500KB on a 64 bit machine. However, Lua code is harder to write than Python code as the language lacks most of the batteries that Python includes. Writing large programs in Lua is rather futile, but it provides a perfect backup language when raw speed is more important than simplicity. Lupa is a very fast and thin wrapper around LuaJIT. It makes it easy to write dynamic Lua code that accompanies dynamic Python code by switching between the two languages at runtime, based on the tradeoff between simplicity and speed. [1] LuaJIT2: http://luajit.org/ [2] http://shootout.alioth.debian.org/u64/performance.php?test=mandelbrot
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Stefan Behnel