def irv_sucks(votes):
try:
pl = plurality_winner(votes)
if condorcet_winner(votes) != pl:
return False
if irv_winner(votes) != pl:
print(votes)
return True
except Ambiguous:
return False
def irv_works(votes):
try:
iv = irv_winner(votes)
if condorcet_winner(votes) != iv:
return False
if plurality_winner(votes) != iv:
print(votes)
return True
except Ambiguous:
return False
def distinct_from_condorcet(votes):
try:
p = plurality_winner(votes)
c = condorcet_winner(votes)
if c == p:
return False
s = simple_irv_winner(votes)
if s == c:
return False
irv = irv_winner(votes)
return (
(p != irv) and (p != s) and (s != irv)
)
except Ambiguous:
return False
[0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3],
[0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3],
[1, 0, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3],
[1, 0, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3],
[1, 0, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3], [1, 0, 2, 3],
[1, 0, 2, 3], [1, 0, 2, 3], [2, 0, 1, 3], [2, 0, 1, 3], [2, 3, 0, 1],
[2, 3, 0, 1], [2, 3, 0, 1], [2, 3, 0, 1], [2, 3, 0, 1], [2, 3, 0, 1],
[2, 3, 0, 1], [2, 3, 0, 1], [3, 1, 0, 2], [3, 1, 0, 2], [3, 1, 0, 2],
[3, 1, 0, 2], [3, 1, 0, 2], [3, 1, 0, 2], [3, 1, 0, 2], [3, 1, 0, 2],
[3, 1, 0, 2], [3, 1, 0, 2], [3, 1, 0, 2], [3, 1, 0, 2]]
if __name__ == '__main__':
from vbe.output import output_election, name
result = ex2
print("\n------------\n")
print(result)
print("\n------------\n")
output_election(result, 1)
print()
print("The Plurality winner is %s." % (name(plurality_winner(result)), ))
print()
print("The IRV winner is %s." % (name(irv_winner(result)), ))
print()
print("The Condorcet winner is %s." % (name(condorcet_winner(result)), ))
from vbe.simple_runoff_example import simple_irv_winner
assert simple_irv_winner(result) == plurality_winner(result)
0], [2, 1, 0],
[2, 1, 0], [2, 1, 0], [2, 1, 0], [2, 1, 0],
[2, 1, 0]]
assert is_splitting_example(non_condorcet_splitter)
if __name__ == '__main__':
from vbe.output import output_votes, name, joined_list
result = non_condorcet_splitter
winner = list(stv(result, 1))[0]
house = sorted(stv(result, 2))
assert len(house) == 2
assert winner != condorcet_winner(non_condorcet_splitter)
print("\n------------\n")
print(result)
print("\n------------\n")
print("%d voters are choosing between %d candidates: %s." %
(len(result), len(result[0]), joined_list(sorted(result[0]))))
print()
output_votes(result)
print()
print(("The IRV winner is %s, but when electing two candidates "
"we elect %s and %s") %