def solve(problem):
"Return a satisfying assignment for problem, or None if impossible."
variables = sat.problem_variables(problem)
for env in gen_assignments(variables):
if sat.seems_consistent(problem, env):
return env
return None
def solve(problem):
"Return a satisfying assignment for problem, or None if impossible."
variables = sat.problem_variables(problem)
for env in gen_assignments(variables):
if sat.seems_consistent(problem, env):
return env
return None
def solve(problem):
"Return a satisfying assignment for problem, or None if impossible."
env = {}
index = build_index(problem)
return solving(index, env,
sat.problem_variables(problem),
on_update(problem, env, []))
def show(self, coloring=False):
"Display the board."
def write(color, s):
if coloring: set_color(color)
sys.stdout.write(s)
def present(v, clause):
color = (satisfied if self.clause_is_satisfied(clause) else unsatisfied)
pos, neg = v in clause, -v in clause
if not pos and not neg:
write(color, '.')
elif self.env[v] is None:
write(color, 'O*'[pos])
else:
write(color, 'O*'[self.env[v] == pos])
for v in sat.problem_variables(self.problem):
write(other, self.name_of_variable(v) + ' ')
for clause in self.problem:
present(v, clause)
write(other, ' ' + self.name_of_variable(v))
write(other, '\r\n')
write(other, '')
def solve(problem):
"Return a satisfying assignment for problem, or None if impossible."
return solving(problem, {}, sat.problem_variables(problem))
def solve(problem):
"Return a satisfying assignment for problem, or None if impossible."
index, unit_literals = build_index(problem)
if index == 'contradiction': return None
return solving(index, {}, sat.problem_variables(problem), unit_literals)
def solve(problem):
"Return a satisfying assignment for problem, or None if impossible."
env = {}
index = build_index(problem)
return solving(index, env, sat.problem_variables(problem),
on_update(problem, env, []))
def solve(problem):
"Return a satisfying assignment for problem, or None if impossible."
return solving(problem, {}, sat.problem_variables(problem))
def solve(problem):
"Return a satisfying assignment for problem, or None if impossible."
global index, model
index, model = {}, {}
if not make_index(problem): return None
return model if solving(sat.problem_variables(problem)) else None
def __init__(self, problem):
self.problem = problem
variables = sat.problem_variables(problem)
self.env = dict((v, False) for v in variables)
self.labels = ('1234567890' + string.ascii_uppercase)[:len(variables)]
def solve(problem):
"Return a satisfying assignment for problem, or None if impossible."
global index, model
index, model = {}, {}
if not make_index(problem): return None
return model if solving(sat.problem_variables(problem)) else None