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from cython.cimports.sin_of_square import Function, SinOfSquareFunction
def integrate(f: Function, a: float, b: float, N: cython.int):
i: cython.int
if f is None:
raise ValueError("f cannot be None")
s: float = 0
dx: float = (b - a) / N
for i in range(N):
s += f.evaluate(a + i * dx)
return s * dx
print(integrate(SinOfSquareFunction(), 0, 1, 10000))
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