Minimal python RPC implementation in a single file based on the JSON-RPC 2.0 specs.

jsonrpyc.RPC instances basically wrap an input stream and an output stream in order to communicate with other services. A service is not even forced to be written in Python as long as it strictly implements the JSON-RPC 2.0 specs. A suitable implementation for NodeJs is node-json-rpc. A jsonrpyc.RPC instance may wrap a target object. Incomming requests will be routed to methods of this object whose result might be sent back as a response. Example implementation:

import jsonrpyc

class MyTarget(object):

    def greet(self, name):
        return "Hi, %s!" % name

jsonrpyc.RPC(MyTarget())

import jsonrpyc
from subprocess import Popen, PIPE

p = Popen(["python", "server.py"], stdin=PIPE, stdout=PIPE)
rpc = jsonrpyc.RPC(stdout=p.stdin, stdin=p.stdout)


#
# sync usage
#

print(rpc("greet", args=("John",), block=0.1))
# => "Hi, John!"


#
# async usage
#

def cb(err, res=None):
    if err:
        raise err
    print("callback got: " + res)

rpc("greet", args=("John",), callback=cb)

# cb is called asynchronously which prints
# => "callback got: Hi, John!"


#
# shutdown
#

p.stdin.close()
p.stdout.close()
p.terminate()
p.wait()

Via pip

pip install jsonrpyc

or by simply copying the file into your project.

If you like to contribute to jsonrpyc, I'm happy to receive pull requests. Just make sure to add new test cases and run them via:

> python -m unittest tests

• Source hosted at GitHub
• Report issues, questions, feature requests on GitHub Issues