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"""Implementation of Schwefel function."""
import math
__all__ = ['Schwefel']
class Schwefel(object):
def __init__(self, Lower=-500, Upper=500):
self.Lower = Lower
self.Upper = Upper
@classmethod
def function(cls):
def evaluate(D, sol):
val = 0.0
val1 = 0.0
for i in range(D):
val1 += (sol[i] * math.sin(math.sqrt(abs(sol[i]))))
val = 418.9829 * D - val1
return val
return evaluate
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