Pyrlang

This is a drop-in Erlang node implementation in Python, designed to allow access to existing Python projects from Erlang and the opposite. With just a few lines of startup code your Python program becomes a fully functional Erlang node.

Documentation

http://pyrlang.readthedocs.io/en/latest/

Features

• Based on gevent which supports Python 2 and 3;
• Erlang distribution protocol
• Registry of Python 'processes', which are gevent Greenlets and have a pid and an optional registered name;
• Send and receive messages locally and remotely by pid or name;
• Supports net_adm pings
• Supports RPC calls. An RPC call can propagate an exception from Python to Erlang;
• Can create simple process-like Python objects, with a helper to parse gen_server-style calls

Erlang	Python	Notes
Integer, big integer	Python integer	Python is capable if big integers too
Float	Python float
String	term.List	Has a method as_unicode() to get the string
Atom	term.Atom or string	Can use str() or access text_ field directly. Can decode both UTF8 and Latin-1 atoms.
List	term.List or Python list
Tuple	Python tuple
Map	Python dict
Binary, bit string	term.Binary or Python bytes	A class which holds bytes and optional count for last byte bits
Pid, reference	term.Pid and term.Reference	Always long external Pids and Refs with a node name in them
Lambda (fun)	term.Fun	A class which holds parsed fun fields, not usable or useful in Python
	Any other object	Any unknown Python object will be encoded as {'Classname', #{field1 => value1...}}

Building

Requires gevent and greenlet (dependency of gevent) libraries which run on both Python 2 and 3. Running make will run a simple test which starts a node at py@127.0.0.1.

Source for the documentation is in the docs/ directory. It uses sphinx documentation generator. In docs/ run make html or just make.