how to plot or visualize random numbers using matplotlib or pygal?

Im having trouble writing code that I can analyze visually.

how do I Print "6" random numbers: 1-100, 3 times? (from lowest to highest)

example output:

3, 10, 35, 37, 80, 93

11, 13, 68, 79, 96, 99

1, 5, 17, 66, 72, 74

then display it in a bar graph or similar plotting graphics