How to find the roots of a function with fsolve

The function fsolve provided by numpy return the roots of the (non-linear) equations defined by func(x) = 0 given a starting estimate. We will see how to use fsolve to find the root of the function

from scipy.optimize import fsolve
import pylab
import numpy

pow3 = lambda x : x**3

result = fsolve(pow3,10) # starting from x = 10
print result
x = numpy.linspace(-1,1,50)
pylab.plot(x,pow3(x),result,pow3(result),'ro')
pylab.grid(b=1)
pylab.show()

In the following graph we can see f(x) (blue curve) and the solution found (red dot)