farao.py

def f(x):
    a=2.0
    b=3.0
    c=4.0
    return a*x**2+b*x+c

def area(f,a,b,N=100):
    soma=0.0
    dx=(b-a)/N

    for i in range(N):
        soma+=f(a+i*dx)*dx
        pass
    return soma
def main():
    a=-1.0
    b=2.0
    soma=area(f,a,b)
    print("A={}".format(soma))

if __name__ == "__main__":
    main()