How do I adjust (offset) colorbar title in matplotlib

Question

Given the following code:

imshow(np.arange(16*16).reshape(16,16))
cb = colorbar()
cb.set_label(\"Foo\")
cb.set_ticks([0,255])

Which produces:

Answer 1

cb.set_label("Foo",horizontalalignment='right')

The label control with this function is very poor...

---

You could do:

cb = colorbar()
cb.set_ticks([0,255])
ax = cb.ax
ax.text(1.3,0.5,'Foo',rotation=90)

Answer 2

cb.set_label("Foo", labelpad=-1)

Negative labelpad values will move closer to the bar, positive away.