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import re
from .PBNBoard import PBNBoard as pbb
from .ParContract import ParContract
from .Exceptions import FieldNotFoundException
class ParScore(object):
_pbn_contract_pattern = re.compile(r'(\d)([CDHSN])(X?)\s+([NESW])')
_pbn_score_pattern = re.compile(r'(NS|EW)\s+(-?\d})')
_jfr_contract_pattern = re.compile(r'^(\d)([CDHSN])(D?)([NESW])(-?\d+)$')
def __init__(self, board):
self._board = board
def get_pbn_par_contract(self):
contract_field = self._board.get_optimum_result()
if 'Pass' == contract_field:
return ParContract()
contract_match = self._pbn_contract_pattern.match(contract_field)
if not contract_match:
raise ParScoreInvalidException(
'Invalid format for OptimumResult field: ' + contract_field)
score_field = self._board.get_optimum_score()
score_match = self._pbn_score_pattern.match(score_field)
if not score_match:
raise ParScoreInvalidException(
'Invalid format for OptimumScore field: ' + scoreField)
score = int(score_match.group(2))
if 'EW' == score_match.group(1):
score = -score
contract = ParContract(
int(contract_match.group(1)),
contract_match.group(2)[0],
contract_match.group(4)[0],
'X' == contract_match.group(3),
score)
return contract.validate()
def get_jfr_par_contract(self):
par_string = self._board.get_minimax()
par_match = self._jfr_contract_pattern.match(par_string)
if not par_match:
raise ParScoreInvalidException(
'Invalid format for Minimax field: ' + par_string)
if '0' == par_match.group(4):
return ParContract() # pass-out
contract = ParContract(
int(par_match.group(1)),
par_match.group(2)[0],
par_match.group(4)[0],
'D' == par_match.group(3),
int(par_match.group(5)))
return contract.validate()
def _determine_vulnerability(self, vulnerability, declarer):
vulnerability = vulnerability.upper()
return vulnerability in ['ALL', 'BOTH'] \
or (vulnerability not in ['LOVE', 'NONE'] \
and declarer in vulnerability)
def _get_highest_makeable_contract(self, dd_table,
for_ns=True, for_ew=True):
contract = ParContract()
tricks = 0
for i in range(3, -1, -1):
if ((i % 2 == 0) and for_ns) \
or ((i % 2 == 1) and for_ew):
for j in range(0, 5):
level = dd_table[i][j] - 6
denomination = pbb.DENOMINATIONS.index(
contract.denomination) \
if contract.denomination in pbb.DENOMINATIONS \
else -1
if (level > contract.level) \
or ((level == contract.level) \
and (j > denomination)):
contract.level = level
contract.denomination = pbb.DENOMINATIONS[j]
contract.declarer = pbb.PLAYERS[i]
tricks = dd_table[i][j]
vulnerability = self._board.get_vulnerable().upper()
vulnerable = self._determine_vulnerability(
vulnerability, contract.declarer)
contract.score = contract.calculate_score(tricks, vulnerable)
return contract
def get_dd_table_par_contract(self, dd_table):
dealer = self._board.get_dealer()
vulnerability = self._board.get_vulnerable().upper()
ns_highest = self._get_highest_makeable_contract(
dd_table, True, False);
ew_highest = self._get_highest_makeable_contract(
dd_table, False, True)
if ns_highest == ew_highest:
return ns_highest.validate() \
if dealer in ['N', 'S'] else ew_highest.validate()
highest = max(ns_highest, ew_highest)
other_side_highest = min(ew_highest, ns_highest)
ns_playing = highest.declarer in ['N', 'S']
defense_vulnerability = self._determine_vulnerability(
vulnerability, 'E' if ns_playing else 'N')
highest_defense = highest.get_defense(dd_table, defense_vulnerability)
if highest_defense is not None:
# Highest contract has profitable defense
return highest_defense.validate()
denomination_index = pbb.DENOMINATIONS.index(highest.denomination) \
if highest.denomination in pbb.DENOMINATIONS \
else -1
declarer_index = pbb.PLAYERS.index(highest.declarer) \
if highest.declarer in pbb.PLAYERS else -1
player_indexes = [declarer_index, (declarer_index + 2) % 4]
vulnerable = self._determine_vulnerability(
vulnerability, highest.declarer)
score_squared = highest.score * highest.score
possible_optimums = []
for i in range(0, 5):
for player in player_indexes:
level = highest.level
if i > denomination_index:
level -= 1
while level > 0:
contract = ParContract(
level,
pbb.DENOMINATIONS[i],
pbb.PLAYERS[player],
False, 0)
contract.score = contract.calculate_score(
dd_table[player][i], vulnerable)
if other_side_highest > contract:
# Contract is lower than other side's contract
break
if (highest.score * contract.score) > 0:
# Contract makes
if abs(contract.score) >= abs(highest.score):
# Contract is profitable
defense = contract.get_defense(
dd_table, defense_vulnerability)
if defense is not None \
and (contract.score * contract.score) \
> (contract.score * defense.score):
# Contract has defense
possible_optimums.append(defense)
# So lower contracts will too.
break
else:
# Contract does not have defense
possible_optimums.append(contract)
else:
# Contract is not profitable
break
level -= 1
for contract in possible_optimums:
if abs(contract.score) > abs(highest.score):
# Contract is more profitable
highest = contract
else:
if contract.score == highest.score:
if highest > contract:
# Equally profitable, but lower
highest = contract
return highest.validate()
def get_par_contract(self, dd_table):
try:
return self.get_jfr_par_contract()
except FieldNotFoundException:
try:
return self.get_pbn_par_contract()
except FieldNotFoundException:
return self.get_dd_table_par_contract(dd_table)
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