LP en pulpa – problema con la variable de decisión

Deseo que mi variable de decisión dependa de las variables iniciales del período anterior que cambia según otra variable de decisión. La línea en la que obtengo un error es:

my_problem += lineup_wk1[i] == starting_lineup[i] + trans_in[i] - trans_out[i] for i in players

donde dice:

“ninguno
Archivo ““, línea 4
my_problem += lineup_wk1[i] == starting_lineup[i] + trans_in[i] – trans_out[i] for i in players
^
SyntaxError: sintaxis inválida”

El código completo es:

players = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']
points = [4.2, 5.3, 6.0, 5.5, 4.5, 5.7, 4.8, 6.9]
cost = [4.5, 5.0, 5.1, 4.9, 5.2, 5.7, 5.2, 6.0]
starting_team = [1,0,1,0,1,0,1,0]

player_points = dict(zip(players, points))
player_cost = dict(zip(players, cost))
starting_lineup = dict(zip(players, starting_team))

my_problem = pulp.LpProblem('LP_model', pulp.LpMaximize)
lineup_wk1 = pulp.LpVariable.dict('lineup_wk1_%s', players, lowBound=0, upBound=1, cat=pulp.LpBinary)
trans_in  = pulp.LpVariable.dict('trans_in_%s', players, lowBound=0, upBound=1, cat=pulp.LpBinary)
trans_out  = pulp.LpVariable.dict('trans_out_%s', players, lowBound=0, upBound=1, cat=pulp.LpBinary)

my_problem += sum([player_points[i] * (lineup_wk1[i]) for i in players])

my_problem += sum([lineup_wk1[i] for i in players]) <= 4
my_problem += sum(trans_in[i] for i in players) <= 2
my_problem += sum(trans_in[i] for i in players) == sum(trans_out[i] for i in players)
my_problem += lineup_wk1[i] == starting_lineup[i] + trans_in[i] - trans_out[i] for i in players

my_problem.solve()