from random import random
import matplotlib.pyplot as plt

mylist = [[random() for _ in range(10)] for _ in range(10)]

fig = plt.figure()
ax = fig.add_axes([0.1, 0.1, 0.6, 0.8])
for i, l in enumerate(mylist):
    ax.plot(range(10), l, label='label_%d' % i)

legenda = ax.legend(loc=2, borderaxespad=0., bbox_to_anchor=(1.02, 1.0))
plt.savefig('plot.png', bbox_extra_artists=[legenda], bbox_inches='tight')
plt.show()