Remove frame around legend in Python Object-Oriented plotting

Question

I would like to remove the frame around the legend box. I found few ways. However, none implement them with "axis method".

The code shown below gets the result but I wish to know a cleaner, more elegant way, perhaps like ax.legend.draw_frame(False) or something similar. Any ideas if such a way exists without using pylab?

SOLUTION: Make use of ax.legend(numpoints=1, loc=3, frameon=False) as suggested by Evert

import numpy as np
import matplotlib.pyplot as plt
from pylab import legend

x = np.linspace(1,10, 100)
y = x**3

fig = plt.figure()
ax = fig.add_subplot(1,1,1)
ax.plot(x,y, 'bo', label='Blah!')
lg = legend(numpoints = 1, loc=2)
lg.get_frame().set_alpha(0)
#ax.legend(numpoints = 1, loc=2)

plt.show()

Answer 1

As @Evert does not wish to answer I will do so in order to mark it as solved. But please give him/her points.

Make use of ax.legend(numpoints=1, loc=3, frameon=False) as suggested by Evert