Refactor Gregory method classes into pyRCV2.method.gregory package
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@ -43,13 +43,13 @@ onmessage = function(evt) {
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// Create counter
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if (evt.data.data.transfers === 'uig') {
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counter = py.pyRCV2.method.base_stv.UIGSTVCounter(election, evt.data.data.options);
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counter = py.pyRCV2.method.gregory.UIGSTVCounter(election, evt.data.data.options);
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} else if (evt.data.data.transfers === 'eg') {
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counter = py.pyRCV2.method.base_stv.EGSTVCounter(election, evt.data.data.options);
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counter = py.pyRCV2.method.gregory.EGSTVCounter(election, evt.data.data.options);
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} else if (evt.data.data.transfers === 'meek') {
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counter = py.pyRCV2.method.meek.MeekSTVCounter(election, evt.data.data.options);
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} else {
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counter = py.pyRCV2.method.base_stv.WIGSTVCounter(election, evt.data.data.options);
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counter = py.pyRCV2.method.gregory.WIGSTVCounter(election, evt.data.data.options);
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}
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if (evt.data.data.options['ties'] === 'backwards_random') {
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@ -18,7 +18,7 @@ import pyRCV2.blt
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import pyRCV2.model
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import pyRCV2.numbers
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from pyRCV2.method.base_stv import UIGSTVCounter, WIGSTVCounter, EGSTVCounter
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from pyRCV2.method.gregory import UIGSTVCounter, WIGSTVCounter, EGSTVCounter
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from pyRCV2.method.meek import MeekSTVCounter
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from pyRCV2.ties import TiesBackwards, TiesForwards, TiesPrompt, TiesRandom
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@ -15,39 +15,11 @@
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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__pragma__ = lambda x: None
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is_py = False
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__pragma__('skip')
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is_py = True
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__pragma__('noskip')
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from pyRCV2.model import CandidateState, CountCard, CountCompleted, CountStepResult
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from pyRCV2.numbers import Num
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from pyRCV2.safedict import SafeDict
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# Stubs for JS
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def groupby(iterable, keyfunc):
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if is_py:
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__pragma__('skip')
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import itertools
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return [list(g) for k, g in itertools.groupby(iterable, keyfunc)]
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__pragma__('noskip')
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else:
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groups = []
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group = []
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last_result = None
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for i in iterable:
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this_result = keyfunc(i)
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__pragma__('opov')
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if last_result is not None and this_result != last_result:
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__pragma__('noopov')
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groups.append(group)
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group = []
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last_result = this_result
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group.append(i)
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if group:
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groups.append(group)
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return groups
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class STVException(Exception):
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def __init__(self, message):
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Exception.__init__(self)
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@ -699,327 +671,3 @@ class BaseSTVCounter:
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if self.options['round_tvs'] is None:
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return num
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return num.round(self.options['round_tvs'], num.ROUND_DOWN)
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class WIGSTVCounter(BaseSTVCounter):
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"""
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Basic weighted inclusive Gregory STV counter
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"""
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def do_surplus(self, candidate_surplus, count_card, surplus):
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next_preferences, total_ballots, total_votes, next_exhausted, exhausted_ballots, exhausted_votes = self.next_preferences(count_card.parcels)
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if self.options['papers'] == 'transferable':
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__pragma__('opov')
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transferable_votes = total_votes - exhausted_votes
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__pragma__('noopov')
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for candidate, x in next_preferences.items():
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cand_ballots = x[0]
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num_ballots = x[1]
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num_votes = x[2]
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new_parcel = []
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if len(cand_ballots) > 0:
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__pragma__('opov')
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self.candidates[candidate].parcels.append(new_parcel)
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__pragma__('noopov')
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__pragma__('opov')
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if self.options['papers'] == 'transferable':
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if transferable_votes > surplus:
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if self.options['round_tvs'] is None:
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self.candidates[candidate].transfers += self.round_votes((num_votes * surplus) / transferable_votes)
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else:
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tv = self.round_tv(surplus / transferable_votes)
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self.candidates[candidate].transfers += self.round_votes(num_votes * tv)
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else:
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self.candidates[candidate].transfers += self.round_votes(num_votes) # Do not allow weight to increase
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else:
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if self.options['round_tvs'] is None:
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self.candidates[candidate].transfers += self.round_votes((num_votes * surplus) / total_votes)
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else:
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tv = self.round_tv(surplus / total_votes)
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self.candidates[candidate].transfers += self.round_votes(num_votes * tv)
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__pragma__('noopov')
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for ballot, ballot_value in cand_ballots:
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__pragma__('opov')
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if self.options['papers'] == 'transferable':
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if transferable_votes > surplus:
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if self.options['round_tvs'] is None:
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new_value = (ballot_value * surplus) / transferable_votes
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else:
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tv = self.round_tv(surplus / transferable_votes)
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new_value = ballot_value * tv
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else:
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new_value = ballot_value
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else:
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if self.options['round_tvs'] is None:
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new_value = (ballot_value * surplus) / total_votes
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else:
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tv = self.round_tv(surplus / total_votes)
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new_value = ballot_value * tv
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new_parcel.append((ballot, self.round_weight(new_value)))
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__pragma__('noopov')
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__pragma__('opov')
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if self.options['papers'] == 'transferable':
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if transferable_votes > surplus:
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pass # No ballots exhaust
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else:
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self.exhausted.transfers += self.round_votes((surplus - transferable_votes))
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else:
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self.exhausted.transfers += self.round_votes((exhausted_votes * surplus) / total_votes)
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__pragma__('noopov')
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__pragma__('opov')
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count_card.transfers -= surplus
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__pragma__('noopov')
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count_card.state = CandidateState.ELECTED
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def do_exclusion(self, candidates_excluded):
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# Optimisation: Pre-sort exclusion ballots if applicable
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# self._exclusion[1] -> list of ballots-per-stage, ballots-per-stage = List[Tuple[Candidate,List[Ballot+Value]]]
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if self._exclusion is None:
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if self.options['exclusion'] == 'one_round':
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self._exclusion = (candidates_excluded, [[(c, [b for p in cc.parcels for b in p]) for c, cc in candidates_excluded]])
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elif self.options['exclusion'] == 'parcels_by_order':
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c, cc = candidates_excluded[0]
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self._exclusion = (candidates_excluded, [[(c, p)] for p in cc.parcels])
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elif self.options['exclusion'] == 'by_value':
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ballots = [(c, b, bv) for c, cc in candidates_excluded for p in cc.parcels for b, bv in p]
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# Sort ballots by value
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__pragma__('opov')
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ballots.sort(key=lambda x: x[2] / x[1].value, reverse=True)
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# Round to 8 decimal places to consider equality
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# FIXME: Work out a better way of doing this
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if self.options['round_tvs']:
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ballots_by_value = groupby(ballots, lambda x: self.round_tv(x[2] / x[1].value))
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else:
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ballots_by_value = groupby(ballots, lambda x: (x[2] / x[1].value).round(8, x[2].ROUND_DOWN))
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__pragma__('noopov')
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# TODO: Can we combine ballots for each candidate within each stage?
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self._exclusion = (candidates_excluded, [[(c, [(b, bv)]) for c, b, bv in x] for x in ballots_by_value])
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else:
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raise STVException('Invalid exclusion mode')
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#print([[bv / b.value for c, bb in stage for b, bv in bb] for stage in self._exclusion[1]])
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this_exclusion = self._exclusion[1][0]
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self._exclusion[1].remove(this_exclusion)
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# Transfer votes
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next_preferences, total_ballots, total_votes, next_exhausted, exhausted_ballots, exhausted_votes = self.next_preferences([bb for c, bb in this_exclusion])
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for candidate, x in next_preferences.items():
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cand_ballots, num_ballots, num_votes = x[0], x[1], x[2]
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new_parcel = []
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if len(cand_ballots) > 0:
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__pragma__('opov')
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self.candidates[candidate].parcels.append(new_parcel)
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__pragma__('noopov')
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__pragma__('opov')
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self.candidates[candidate].transfers += self.round_votes(num_votes)
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__pragma__('noopov')
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for ballot, ballot_value in cand_ballots:
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__pragma__('opov')
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new_parcel.append((ballot, ballot_value))
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__pragma__('noopov')
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# Subtract votes
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__pragma__('opov')
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self.exhausted.transfers += self.round_votes(exhausted_votes)
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__pragma__('noopov')
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for candidate, ballots in this_exclusion:
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total_votes = Num(0)
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for ballot, ballot_value in ballots:
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__pragma__('opov')
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total_votes += ballot_value
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__pragma__('noopov')
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__pragma__('opov')
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self.candidates[candidate].transfers -= total_votes
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__pragma__('noopov')
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if len(self._exclusion[1]) == 0:
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for candidate_excluded, count_card in candidates_excluded:
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__pragma__('opov')
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count_card.transfers -= count_card.votes
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__pragma__('noopov')
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count_card.state = CandidateState.EXCLUDED
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self._exclusion = None
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class UIGSTVCounter(WIGSTVCounter):
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"""
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Basic unweighted inclusive Gregory STV counter
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"""
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def __init__(self, *args):
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WIGSTVCounter.__init__(self, *args)
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def do_surplus(self, candidate_surplus, count_card, surplus):
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next_preferences, total_ballots, total_votes, next_exhausted, exhausted_ballots, exhausted_votes = self.next_preferences(count_card.parcels)
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if self.options['papers'] == 'transferable':
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__pragma__('opov')
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transferable_ballots = total_ballots - exhausted_ballots
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transferable_votes = total_votes - exhausted_votes
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__pragma__('noopov')
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for candidate, x in next_preferences.items():
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cand_ballots = x[0]
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num_ballots = x[1]
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num_votes = x[2]
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new_parcel = []
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if len(cand_ballots) > 0:
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__pragma__('opov')
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self.candidates[candidate].parcels.append(new_parcel)
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__pragma__('noopov')
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__pragma__('opov')
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if self.options['papers'] == 'transferable':
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if transferable_votes > surplus:
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if self.options['round_tvs'] is None:
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self.candidates[candidate].transfers += self.round_votes((num_ballots * surplus) / transferable_ballots)
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else:
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tv = self.round_tv(surplus / transferable_ballots)
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self.candidates[candidate].transfers += self.round_votes(num_ballots * tv)
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else:
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self.candidates[candidate].transfers += self.round_votes(num_votes)
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else:
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if self.options['round_tvs'] is None:
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self.candidates[candidate].transfers += self.round_votes((num_ballots * surplus) / total_ballots)
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else:
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tv = self.round_tv(surplus / total_ballots)
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self.candidates[candidate].transfers += self.round_votes(num_ballots * tv)
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__pragma__('noopov')
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for ballot, ballot_value in cand_ballots:
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__pragma__('opov')
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if self.options['papers'] == 'transferable':
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if transferable_votes > surplus:
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if self.options['round_tvs'] is None:
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new_value = (ballot.value * surplus) / transferable_ballots
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else:
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tv = self.round_tv(surplus / transferable_ballots)
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new_value = ballot.value * tv
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else:
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new_value = ballot_value
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else:
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if self.options['round_tvs'] is None:
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new_value = (ballot.value * surplus) / total_ballots
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else:
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tv = self.round_tv(surplus / total_ballots)
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new_value = ballot.value * tv
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new_parcel.append((ballot, self.round_weight(new_value)))
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__pragma__('noopov')
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__pragma__('opov')
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if self.options['papers'] == 'transferable':
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if transferable_votes > surplus:
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pass # No ballots exhaust
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else:
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self.exhausted.transfers += self.round_votes(surplus - transferable_votes)
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else:
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self.exhausted.transfers += self.round_votes((exhausted_ballots * surplus) / total_ballots)
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__pragma__('noopov')
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__pragma__('opov')
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count_card.transfers -= surplus
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__pragma__('noopov')
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count_card.state = CandidateState.ELECTED
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class EGSTVCounter(UIGSTVCounter):
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"""
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Exclusive Gregory (last bundle) STV implementation
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"""
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def do_surplus(self, candidate_surplus, count_card, surplus):
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"""Overrides UIGSTVCounter.do_surplus"""
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last_bundle = count_card.parcels[len(count_card.parcels)-1]
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next_preferences, total_ballots, total_votes, next_exhausted, exhausted_ballots, exhausted_votes = self.next_preferences([last_bundle])
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if self.options['papers'] == 'transferable':
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__pragma__('opov')
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transferable_ballots = total_ballots - exhausted_ballots
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transferable_votes = total_votes - exhausted_votes
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__pragma__('noopov')
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for candidate, x in next_preferences.items():
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cand_ballots = x[0]
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num_ballots = x[1]
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num_votes = x[2]
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new_parcel = []
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if len(cand_ballots) > 0:
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__pragma__('opov')
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self.candidates[candidate].parcels.append(new_parcel)
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__pragma__('noopov')
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__pragma__('opov')
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if self.options['papers'] == 'transferable':
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if transferable_votes > surplus:
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if self.options['round_tvs'] is None:
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self.candidates[candidate].transfers += self.round_votes((num_ballots * surplus) / transferable_ballots)
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else:
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tv = self.round_tv(surplus / transferable_ballots)
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self.candidates[candidate].transfers += self.round_votes(num_ballots * tv)
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else:
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self.candidates[candidate].transfers += self.round_votes(num_votes)
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else:
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if self.options['round_tvs'] is None:
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self.candidates[candidate].transfers += self.round_votes((num_ballots * surplus) / total_ballots)
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else:
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tv = self.round_tv(surplus / total_ballots)
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self.candidates[candidate].transfers += self.round_votes(num_ballots * tv)
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__pragma__('noopov')
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for ballot, ballot_value in cand_ballots:
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__pragma__('opov')
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if self.options['papers'] == 'transferable':
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if transferable_votes > surplus:
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if self.options['round_tvs'] is None:
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new_value = (ballot.value * surplus) / transferable_ballots
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else:
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tv = self.round_tv(surplus / transferable_ballots)
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new_value = ballot.value * tv
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else:
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new_value = ballot_value
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else:
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if self.options['round_tvs'] is None:
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new_value = (ballot.value * surplus) / total_ballots
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else:
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tv = self.round_tv(surplus / total_ballots)
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new_value = ballot.value * tv
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new_parcel.append((ballot, self.round_weight(new_value)))
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__pragma__('noopov')
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__pragma__('opov')
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if self.options['papers'] == 'transferable':
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if transferable_votes > surplus:
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pass # No ballots exhaust
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else:
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self.exhausted.transfers += self.round_votes((surplus - transferable_votes))
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else:
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self.exhausted.transfers += self.round_votes((exhausted_ballots * surplus) / total_ballots)
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__pragma__('noopov')
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__pragma__('opov')
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count_card.transfers -= surplus
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__pragma__('noopov')
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count_card.state = CandidateState.ELECTED
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373
pyRCV2/method/gregory.py
Normal file
373
pyRCV2/method/gregory.py
Normal file
@ -0,0 +1,373 @@
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# pyRCV2: Preferential vote counting
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# Copyright © 2020–2021 Lee Yingtong Li (RunasSudo)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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__pragma__ = lambda x: None
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is_py = False
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__pragma__('skip')
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is_py = True
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__pragma__('noskip')
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from pyRCV2.method.base_stv import BaseSTVCounter, STVException
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from pyRCV2.model import CandidateState
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from pyRCV2.numbers import Num
|
||||
|
||||
# Stubs for JS
|
||||
def groupby(iterable, keyfunc):
|
||||
if is_py:
|
||||
__pragma__('skip')
|
||||
import itertools
|
||||
return [list(g) for k, g in itertools.groupby(iterable, keyfunc)]
|
||||
__pragma__('noskip')
|
||||
else:
|
||||
groups = []
|
||||
group = []
|
||||
last_result = None
|
||||
for i in iterable:
|
||||
this_result = keyfunc(i)
|
||||
__pragma__('opov')
|
||||
if last_result is not None and this_result != last_result:
|
||||
__pragma__('noopov')
|
||||
groups.append(group)
|
||||
group = []
|
||||
last_result = this_result
|
||||
group.append(i)
|
||||
if group:
|
||||
groups.append(group)
|
||||
return groups
|
||||
|
||||
class WIGSTVCounter(BaseSTVCounter):
|
||||
"""
|
||||
Basic weighted inclusive Gregory STV counter
|
||||
"""
|
||||
|
||||
def do_surplus(self, candidate_surplus, count_card, surplus):
|
||||
next_preferences, total_ballots, total_votes, next_exhausted, exhausted_ballots, exhausted_votes = self.next_preferences(count_card.parcels)
|
||||
|
||||
if self.options['papers'] == 'transferable':
|
||||
__pragma__('opov')
|
||||
transferable_votes = total_votes - exhausted_votes
|
||||
__pragma__('noopov')
|
||||
|
||||
for candidate, x in next_preferences.items():
|
||||
cand_ballots = x[0]
|
||||
num_ballots = x[1]
|
||||
num_votes = x[2]
|
||||
|
||||
new_parcel = []
|
||||
if len(cand_ballots) > 0:
|
||||
__pragma__('opov')
|
||||
self.candidates[candidate].parcels.append(new_parcel)
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
if self.options['papers'] == 'transferable':
|
||||
if transferable_votes > surplus:
|
||||
if self.options['round_tvs'] is None:
|
||||
self.candidates[candidate].transfers += self.round_votes((num_votes * surplus) / transferable_votes)
|
||||
else:
|
||||
tv = self.round_tv(surplus / transferable_votes)
|
||||
self.candidates[candidate].transfers += self.round_votes(num_votes * tv)
|
||||
else:
|
||||
self.candidates[candidate].transfers += self.round_votes(num_votes) # Do not allow weight to increase
|
||||
else:
|
||||
if self.options['round_tvs'] is None:
|
||||
self.candidates[candidate].transfers += self.round_votes((num_votes * surplus) / total_votes)
|
||||
else:
|
||||
tv = self.round_tv(surplus / total_votes)
|
||||
self.candidates[candidate].transfers += self.round_votes(num_votes * tv)
|
||||
__pragma__('noopov')
|
||||
|
||||
for ballot, ballot_value in cand_ballots:
|
||||
__pragma__('opov')
|
||||
if self.options['papers'] == 'transferable':
|
||||
if transferable_votes > surplus:
|
||||
if self.options['round_tvs'] is None:
|
||||
new_value = (ballot_value * surplus) / transferable_votes
|
||||
else:
|
||||
tv = self.round_tv(surplus / transferable_votes)
|
||||
new_value = ballot_value * tv
|
||||
else:
|
||||
new_value = ballot_value
|
||||
else:
|
||||
if self.options['round_tvs'] is None:
|
||||
new_value = (ballot_value * surplus) / total_votes
|
||||
else:
|
||||
tv = self.round_tv(surplus / total_votes)
|
||||
new_value = ballot_value * tv
|
||||
|
||||
new_parcel.append((ballot, self.round_weight(new_value)))
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
if self.options['papers'] == 'transferable':
|
||||
if transferable_votes > surplus:
|
||||
pass # No ballots exhaust
|
||||
else:
|
||||
self.exhausted.transfers += self.round_votes((surplus - transferable_votes))
|
||||
else:
|
||||
self.exhausted.transfers += self.round_votes((exhausted_votes * surplus) / total_votes)
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
count_card.transfers -= surplus
|
||||
__pragma__('noopov')
|
||||
|
||||
count_card.state = CandidateState.ELECTED
|
||||
|
||||
def do_exclusion(self, candidates_excluded):
|
||||
# Optimisation: Pre-sort exclusion ballots if applicable
|
||||
# self._exclusion[1] -> list of ballots-per-stage, ballots-per-stage = List[Tuple[Candidate,List[Ballot+Value]]]
|
||||
if self._exclusion is None:
|
||||
if self.options['exclusion'] == 'one_round':
|
||||
self._exclusion = (candidates_excluded, [[(c, [b for p in cc.parcels for b in p]) for c, cc in candidates_excluded]])
|
||||
elif self.options['exclusion'] == 'parcels_by_order':
|
||||
c, cc = candidates_excluded[0]
|
||||
self._exclusion = (candidates_excluded, [[(c, p)] for p in cc.parcels])
|
||||
elif self.options['exclusion'] == 'by_value':
|
||||
ballots = [(c, b, bv) for c, cc in candidates_excluded for p in cc.parcels for b, bv in p]
|
||||
|
||||
# Sort ballots by value
|
||||
__pragma__('opov')
|
||||
ballots.sort(key=lambda x: x[2] / x[1].value, reverse=True)
|
||||
# Round to 8 decimal places to consider equality
|
||||
# FIXME: Work out a better way of doing this
|
||||
if self.options['round_tvs']:
|
||||
ballots_by_value = groupby(ballots, lambda x: self.round_tv(x[2] / x[1].value))
|
||||
else:
|
||||
ballots_by_value = groupby(ballots, lambda x: (x[2] / x[1].value).round(8, x[2].ROUND_DOWN))
|
||||
__pragma__('noopov')
|
||||
|
||||
# TODO: Can we combine ballots for each candidate within each stage?
|
||||
self._exclusion = (candidates_excluded, [[(c, [(b, bv)]) for c, b, bv in x] for x in ballots_by_value])
|
||||
else:
|
||||
raise STVException('Invalid exclusion mode')
|
||||
|
||||
#print([[bv / b.value for c, bb in stage for b, bv in bb] for stage in self._exclusion[1]])
|
||||
|
||||
this_exclusion = self._exclusion[1][0]
|
||||
self._exclusion[1].remove(this_exclusion)
|
||||
|
||||
# Transfer votes
|
||||
|
||||
next_preferences, total_ballots, total_votes, next_exhausted, exhausted_ballots, exhausted_votes = self.next_preferences([bb for c, bb in this_exclusion])
|
||||
for candidate, x in next_preferences.items():
|
||||
cand_ballots, num_ballots, num_votes = x[0], x[1], x[2]
|
||||
|
||||
new_parcel = []
|
||||
if len(cand_ballots) > 0:
|
||||
__pragma__('opov')
|
||||
self.candidates[candidate].parcels.append(new_parcel)
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
self.candidates[candidate].transfers += self.round_votes(num_votes)
|
||||
__pragma__('noopov')
|
||||
|
||||
for ballot, ballot_value in cand_ballots:
|
||||
__pragma__('opov')
|
||||
new_parcel.append((ballot, ballot_value))
|
||||
__pragma__('noopov')
|
||||
|
||||
# Subtract votes
|
||||
|
||||
__pragma__('opov')
|
||||
self.exhausted.transfers += self.round_votes(exhausted_votes)
|
||||
__pragma__('noopov')
|
||||
|
||||
for candidate, ballots in this_exclusion:
|
||||
total_votes = Num(0)
|
||||
for ballot, ballot_value in ballots:
|
||||
__pragma__('opov')
|
||||
total_votes += ballot_value
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
self.candidates[candidate].transfers -= total_votes
|
||||
__pragma__('noopov')
|
||||
|
||||
if len(self._exclusion[1]) == 0:
|
||||
for candidate_excluded, count_card in candidates_excluded:
|
||||
__pragma__('opov')
|
||||
count_card.transfers -= count_card.votes
|
||||
__pragma__('noopov')
|
||||
count_card.state = CandidateState.EXCLUDED
|
||||
self._exclusion = None
|
||||
|
||||
class UIGSTVCounter(WIGSTVCounter):
|
||||
"""
|
||||
Basic unweighted inclusive Gregory STV counter
|
||||
"""
|
||||
|
||||
def __init__(self, *args):
|
||||
WIGSTVCounter.__init__(self, *args)
|
||||
|
||||
def do_surplus(self, candidate_surplus, count_card, surplus):
|
||||
next_preferences, total_ballots, total_votes, next_exhausted, exhausted_ballots, exhausted_votes = self.next_preferences(count_card.parcels)
|
||||
|
||||
if self.options['papers'] == 'transferable':
|
||||
__pragma__('opov')
|
||||
transferable_ballots = total_ballots - exhausted_ballots
|
||||
transferable_votes = total_votes - exhausted_votes
|
||||
__pragma__('noopov')
|
||||
|
||||
for candidate, x in next_preferences.items():
|
||||
cand_ballots = x[0]
|
||||
num_ballots = x[1]
|
||||
num_votes = x[2]
|
||||
|
||||
new_parcel = []
|
||||
if len(cand_ballots) > 0:
|
||||
__pragma__('opov')
|
||||
self.candidates[candidate].parcels.append(new_parcel)
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
if self.options['papers'] == 'transferable':
|
||||
if transferable_votes > surplus:
|
||||
if self.options['round_tvs'] is None:
|
||||
self.candidates[candidate].transfers += self.round_votes((num_ballots * surplus) / transferable_ballots)
|
||||
else:
|
||||
tv = self.round_tv(surplus / transferable_ballots)
|
||||
self.candidates[candidate].transfers += self.round_votes(num_ballots * tv)
|
||||
else:
|
||||
self.candidates[candidate].transfers += self.round_votes(num_votes)
|
||||
else:
|
||||
if self.options['round_tvs'] is None:
|
||||
self.candidates[candidate].transfers += self.round_votes((num_ballots * surplus) / total_ballots)
|
||||
else:
|
||||
tv = self.round_tv(surplus / total_ballots)
|
||||
self.candidates[candidate].transfers += self.round_votes(num_ballots * tv)
|
||||
__pragma__('noopov')
|
||||
|
||||
for ballot, ballot_value in cand_ballots:
|
||||
__pragma__('opov')
|
||||
if self.options['papers'] == 'transferable':
|
||||
if transferable_votes > surplus:
|
||||
if self.options['round_tvs'] is None:
|
||||
new_value = (ballot.value * surplus) / transferable_ballots
|
||||
else:
|
||||
tv = self.round_tv(surplus / transferable_ballots)
|
||||
new_value = ballot.value * tv
|
||||
else:
|
||||
new_value = ballot_value
|
||||
else:
|
||||
if self.options['round_tvs'] is None:
|
||||
new_value = (ballot.value * surplus) / total_ballots
|
||||
else:
|
||||
tv = self.round_tv(surplus / total_ballots)
|
||||
new_value = ballot.value * tv
|
||||
|
||||
new_parcel.append((ballot, self.round_weight(new_value)))
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
if self.options['papers'] == 'transferable':
|
||||
if transferable_votes > surplus:
|
||||
pass # No ballots exhaust
|
||||
else:
|
||||
self.exhausted.transfers += self.round_votes(surplus - transferable_votes)
|
||||
else:
|
||||
self.exhausted.transfers += self.round_votes((exhausted_ballots * surplus) / total_ballots)
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
count_card.transfers -= surplus
|
||||
__pragma__('noopov')
|
||||
|
||||
count_card.state = CandidateState.ELECTED
|
||||
|
||||
class EGSTVCounter(UIGSTVCounter):
|
||||
"""
|
||||
Exclusive Gregory (last bundle) STV implementation
|
||||
"""
|
||||
|
||||
def do_surplus(self, candidate_surplus, count_card, surplus):
|
||||
"""Overrides UIGSTVCounter.do_surplus"""
|
||||
|
||||
last_bundle = count_card.parcels[len(count_card.parcels)-1]
|
||||
next_preferences, total_ballots, total_votes, next_exhausted, exhausted_ballots, exhausted_votes = self.next_preferences([last_bundle])
|
||||
|
||||
if self.options['papers'] == 'transferable':
|
||||
__pragma__('opov')
|
||||
transferable_ballots = total_ballots - exhausted_ballots
|
||||
transferable_votes = total_votes - exhausted_votes
|
||||
__pragma__('noopov')
|
||||
|
||||
for candidate, x in next_preferences.items():
|
||||
cand_ballots = x[0]
|
||||
num_ballots = x[1]
|
||||
num_votes = x[2]
|
||||
|
||||
new_parcel = []
|
||||
if len(cand_ballots) > 0:
|
||||
__pragma__('opov')
|
||||
self.candidates[candidate].parcels.append(new_parcel)
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
if self.options['papers'] == 'transferable':
|
||||
if transferable_votes > surplus:
|
||||
if self.options['round_tvs'] is None:
|
||||
self.candidates[candidate].transfers += self.round_votes((num_ballots * surplus) / transferable_ballots)
|
||||
else:
|
||||
tv = self.round_tv(surplus / transferable_ballots)
|
||||
self.candidates[candidate].transfers += self.round_votes(num_ballots * tv)
|
||||
else:
|
||||
self.candidates[candidate].transfers += self.round_votes(num_votes)
|
||||
else:
|
||||
if self.options['round_tvs'] is None:
|
||||
self.candidates[candidate].transfers += self.round_votes((num_ballots * surplus) / total_ballots)
|
||||
else:
|
||||
tv = self.round_tv(surplus / total_ballots)
|
||||
self.candidates[candidate].transfers += self.round_votes(num_ballots * tv)
|
||||
__pragma__('noopov')
|
||||
|
||||
for ballot, ballot_value in cand_ballots:
|
||||
__pragma__('opov')
|
||||
if self.options['papers'] == 'transferable':
|
||||
if transferable_votes > surplus:
|
||||
if self.options['round_tvs'] is None:
|
||||
new_value = (ballot.value * surplus) / transferable_ballots
|
||||
else:
|
||||
tv = self.round_tv(surplus / transferable_ballots)
|
||||
new_value = ballot.value * tv
|
||||
else:
|
||||
new_value = ballot_value
|
||||
else:
|
||||
if self.options['round_tvs'] is None:
|
||||
new_value = (ballot.value * surplus) / total_ballots
|
||||
else:
|
||||
tv = self.round_tv(surplus / total_ballots)
|
||||
new_value = ballot.value * tv
|
||||
|
||||
new_parcel.append((ballot, self.round_weight(new_value)))
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
if self.options['papers'] == 'transferable':
|
||||
if transferable_votes > surplus:
|
||||
pass # No ballots exhaust
|
||||
else:
|
||||
self.exhausted.transfers += self.round_votes((surplus - transferable_votes))
|
||||
else:
|
||||
self.exhausted.transfers += self.round_votes((exhausted_ballots * surplus) / total_ballots)
|
||||
__pragma__('noopov')
|
||||
|
||||
__pragma__('opov')
|
||||
count_card.transfers -= surplus
|
||||
__pragma__('noopov')
|
||||
|
||||
count_card.state = CandidateState.ELECTED
|
||||
@ -16,7 +16,7 @@
|
||||
|
||||
import pyRCV2.blt
|
||||
import pyRCV2.model
|
||||
import pyRCV2.method, pyRCV2.method.base_stv, pyRCV2.method.meek
|
||||
import pyRCV2.method, pyRCV2.method.base_stv, pyRCV2.method.gregory, pyRCV2.method.meek
|
||||
import pyRCV2.numbers
|
||||
import pyRCV2.random
|
||||
import pyRCV2.ties
|
||||
|
||||
@ -19,7 +19,7 @@ from pytest_steps import test_steps
|
||||
|
||||
import pyRCV2.blt
|
||||
import pyRCV2.numbers
|
||||
from pyRCV2.method.base_stv import UIGSTVCounter
|
||||
from pyRCV2.method.gregory import UIGSTVCounter
|
||||
from pyRCV2.model import CandidateState, CountCompleted
|
||||
|
||||
import csv
|
||||
|
||||
@ -16,7 +16,7 @@
|
||||
|
||||
import pyRCV2.blt
|
||||
import pyRCV2.numbers
|
||||
import pyRCV2.method.base_stv
|
||||
import pyRCV2.method.gregory
|
||||
from pyRCV2.model import CountCompleted
|
||||
|
||||
import json
|
||||
@ -59,7 +59,7 @@ def maketst(numbers, counter_cls, options):
|
||||
|
||||
return t_py, t_js
|
||||
|
||||
test_prsa1_scottish_py, test_prsa1_scottish_js = maketst('Fixed', 'pyRCV2.method.base_stv.WIGSTVCounter', {})
|
||||
test_prsa1_stvc_py, test_prsa1_stvc_js = maketst('Rational', 'pyRCV2.method.base_stv.WIGSTVCounter', {'quota': 'droop_exact', 'quota_criterion': 'gt', 'prog_quota': True})
|
||||
test_prsa1_senate_py, test_prsa1_senate_js = maketst('Fixed', 'pyRCV2.method.base_stv.UIGSTVCounter', {'surplus_order': 'order', 'exclusion': 'by_value'})
|
||||
test_prsa1_wright_py, test_prsa1_wright_js = maketst('Fixed', 'pyRCV2.method.base_stv.WIGSTVCounter', {'exclusion': 'wright'})
|
||||
test_prsa1_scottish_py, test_prsa1_scottish_js = maketst('Fixed', 'pyRCV2.method.gregory.WIGSTVCounter', {})
|
||||
test_prsa1_stvc_py, test_prsa1_stvc_js = maketst('Rational', 'pyRCV2.method.gregory.WIGSTVCounter', {'quota': 'droop_exact', 'quota_criterion': 'gt', 'prog_quota': True})
|
||||
test_prsa1_senate_py, test_prsa1_senate_js = maketst('Fixed', 'pyRCV2.method.gregory.UIGSTVCounter', {'surplus_order': 'order', 'exclusion': 'by_value'})
|
||||
test_prsa1_wright_py, test_prsa1_wright_js = maketst('Fixed', 'pyRCV2.method.gregory.WIGSTVCounter', {'exclusion': 'wright'})
|
||||
|
||||
@ -19,7 +19,7 @@ from pytest_steps import test_steps
|
||||
|
||||
import pyRCV2.blt
|
||||
import pyRCV2.numbers
|
||||
from pyRCV2.method.base_stv import WIGSTVCounter
|
||||
from pyRCV2.method.gregory import WIGSTVCounter
|
||||
from pyRCV2.model import CandidateState, CountCompleted
|
||||
|
||||
def count_until_exclude(counter):
|
||||
|
||||
@ -18,7 +18,7 @@ from pytest_steps import test_steps
|
||||
|
||||
import pyRCV2.blt
|
||||
import pyRCV2.numbers
|
||||
from pyRCV2.method.base_stv import EGSTVCounter
|
||||
from pyRCV2.method.gregory import EGSTVCounter
|
||||
from pyRCV2.model import CandidateState, CountCompleted
|
||||
|
||||
import csv
|
||||
|
||||
@ -16,7 +16,7 @@
|
||||
|
||||
import pyRCV2.blt
|
||||
import pyRCV2.numbers
|
||||
from pyRCV2.method.base_stv import EGSTVCounter
|
||||
from pyRCV2.method.gregory import EGSTVCounter
|
||||
from pyRCV2.model import CandidateState, CountCompleted
|
||||
|
||||
def isclose(x, y):
|
||||
|
||||
Reference in New Issue
Block a user