การใช้ callback

opt_values = []

def callback(x, f, accept):
# Check if the candidate is an optimum  
    if ____:
# Append the value of the minimized objective to list opt_values      
        opt_values.append(____)

# Run basinhopping to find top two maxima  
result = basinhopping(lambda q: -profit(q), x0, callback=____, minimizer_kwargs=kwargs, niter=5, seed=3) 
top2 = sorted(list(set([round(f, 2) for f in opt_values])), reverse=True)[:2]
top2 = [-f for f in top2]

print(f"{result.message}\nThe highest two values are {top2}")