Links:

• Documentation (at Read the Docs)
• Repository (at GitHub)
• Issue tracker (at GitHub)
• PyPI
• Travis CI

Other resources:

• kiwanami/emacs-epc (Client and server implementation in Emacs Lisp and Perl.)
• tkf/emacs-jedi (Python completion for Emacs using EPC server.)

EPC is an RPC stack for Emacs Lisp and Python-EPC is its server side and client side implementation in Python. Using Python-EPC, you can easily call Emacs Lisp functions from Python and Python functions from Emacs. For example, you can use Python GUI module to build widgets for Emacs (see examples/gtk/server.py for example).

Python-EPC is tested against Python 2.6, 2.7, 3.2 and 3.3.

To install Python-EPC and its dependency sexpdata, run the following command.:

pip install epc

Save the following code as my-server.py. (You can find functionally the same code in examples/echo/server.py):

from epc.server import EPCServer

server = EPCServer(('localhost', 0))

@server.register_function
def echo(*a):
    return a

server.print_port()
server.serve_forever()

And then run the following code from Emacs. This is a stripped version of examples/echo/client.el included in Python-EPC repository.:

(require 'epc)

(defvar my-epc (epc:start-epc "python" '("my-server.py")))

(deferred:$
  (epc:call-deferred my-epc 'echo '(10))
  (deferred:nextc it
    (lambda (x) (message "Return : %S" x))))

(message "Return : %S" (epc:call-sync my-epc 'echo '(10 40)))

If you have carton installed, you can run the above sample by simply typing the following commands:

make elpa        # install EPC in a separated environment
make run-sample  # run examples/echo/client.el

For example of bidirectional communication and integration with GTK, see examples/gtk/server.py. You can run this example by:

make elpa
make run-gtk-sample  # run examples/gtk/client.el

Python-EPC is licensed under GPL v3. See COPYING for details.