source: exampleparties/randompartypy/src/main/resources/RandomParty.py@ 30

import time
import traceback

import geniusweb.inform.ActionDone as ActionDone
import geniusweb.inform.Inform as Inform
import geniusweb.inform.Settings as Settings
import geniusweb.inform.YourTurn as YourTurn


import java.math.BigInteger as BigInteger
import java.net.URI as URI
import java.util.Arrays as Arrays
import java.util.HashSet as HashSet
import java.util.Random as Random
import java.util.Collections as Collections
 
import geniusweb.actions.Accept as Accept
import geniusweb.actions.Action as Action
import geniusweb.actions.Offer as Offer
import geniusweb.actions.PartyId as PartyId
import geniusweb.bidspace.AllPartialBidsList as AllPartialBidsList
import geniusweb.issuevalue.Bid as Bid
import geniusweb.party.Capabilities as Capabilities
import geniusweb.party.DefaultParty as DefaultParty
import geniusweb.profile.Profile as Profile
import geniusweb.profile.PartialOrdering as PartialOrdering
import geniusweb.profile.utilityspace.UtilitySpace as UtilitySpace
import geniusweb.references.ProfileRef as ProfileRef
import geniusweb.references.ProtocolRef as ProtocolRef
import geniusweb.profileconnection.ProfileConnectionFactory as ProfileConnectionFactory
import geniusweb.profileconnection.ProfileInterface as ProfileInterface
import geniusweb.progress.ProgressRounds as ProgressRounds


import com.fasterxml.jackson.databind.ObjectMapper as ObjectMapper

class RandomParty (DefaultParty):
        """
        A simple party that places random bids and accepts when it receives an offer
        with sufficient utility.
        """

        jackson = ObjectMapper()
        random = Random();

        def __init__(self):
                self.profile = None
                self.lastReceivedBid = None

        # Override
        def notifyChange(self, info):
                if isinstance(info, Settings) :
                        self.profile = ProfileConnectionFactory.create(info.getProfile().getURI(), self.getReporter());
                        self.me = info.getID()
                        self.progress = info.getProgress()
                elif isinstance(info , ActionDone): 
                        self.lastActor = info.getAction().getActor()
                        otheract = info.getAction()
                        if isinstance(otheract, Offer):
                                self.lastReceivedBid = otheract.getBid()
                elif isinstance(info , YourTurn):
                        self._myTurn()
                        if isinstance(self.progress, ProgressRounds) :
                                self.progress = self.progress.advance();

        # Override
        def getCapabilities(self): # -> Capabilities
                        return Capabilities(HashSet([ "SAOP"]), Collections.singleton(Profile));

        # Override
        def getDescription(self):
                return "places random bids until it can accept an offer with utility >0.6. Python version"

        # Override
        def terminate(self):
                super(RandomParty,self).terminate()
                if self.profile != None:
                        self.profile.close()
                        self.profile = None


        def _myTurn(self):
                if self.lastReceivedBid != None and self.profile.getProfile().getUtility(self.lastReceivedBid).doubleValue() > 0.6:
                        action = Accept(self.me, self.lastReceivedBid)
                else:
                        bidspace = AllPartialBidsList(self.profile.getProfile().getDomain())
                        bid = None
                        for attempt in range(20):
                                i = self.random.nextInt(bidspace.size()) # warning: jython implicitly converts BigInteger to long.
                                bid = bidspace.get(BigInteger.valueOf(i))
                                if self._isGood(bid):
                                        break
                        action = Offer(self.me, bid);
                try:
                        self.getConnection().send(action)
                except:
                        print 'failed to send action '+action.toString()
                        traceback.print_exc()

        def _isGood(self, bid):
                if bid == None:
                        return false
                profile = self.profile.getProfile()
                if isinstance(profile, UtilitySpace):
                        return profile.getUtility(bid).doubleValue() > 0.6;
                if isinstance(profile, PartialOrdering):
                        return profile.isPreferredOrEqual(bid, profile.getReservationBid())
                raise Exception("Can not handle this type of profile")