How to get one random float number from two ranges (python)

I need to choose a random float number in two ranges in python : 0. < n < 0.2 & 0.8 < n < 1.

Right now I only have one range random.uniform(0, 0.2)

The full line (I'm mapping warm color hsv values) : couleur=hsv2rgb(random.uniform(0, 0.2), 1, 1)

If someone could help... !