IPython/frontend/zmqterminal/completer.py

# -*- coding: utf-8 -*-
import readline
from Queue import Empty

class ClientCompleter2p(object):
    """Client-side completion machinery.

    How it works: self.complete will be called multiple times, with
    state=0,1,2,... When state=0 it should compute ALL the completion matches,
    and then return them for each value of state."""
    
    def __init__(self,client, km):
        self.km =  km
        self.matches = []
        self.client = client
        
    def complete_request(self,text):
        line = readline.get_line_buffer()
        #msg_id = self.km.xreq_channel.complete(text=text,line=line)#this method is not working, the code not continue
        msg = self.km.session.send(self.km.xreq_channel.socket,
                                'complete_request',
                                dict(text=text, line=line))
        # send completion request to kernel
        # Give the kernel up to 0.5s to respond
        msg_xreq = self.km.xreq_channel.get_msg(timeout=0.5)
        if msg["header"]['session'] == msg_xreq["parent_header"]['session'] and \
                        msg_xreq["content"]["status"] == 'ok' and \
                        msg_xreq["msg_type"] == "complete_reply" :
            return msg_xreq["content"]["matches"]
        return []
    
    def complete(self, text, state):
        if state == 0:
            try:
                self.matches = self.complete_request(text)
            except Empty:
                print('WARNING: Kernel timeout on tab completion.')
        
        try:
            return self.matches[state]
        except IndexError:
            return None