adjusting width of subplot columns

hi all,

i have a 3x2 subplot figure, and i would like to adjust the relative
width of the second column. in other words, if i have:

import matplotlib.pyplot as plt
plt.subplot(3, 2, 1)
# plot stuff
plt.subplot(3, 2, 2)
# plot, etc...

i want to make it so the second column occupies less width in the
figure than the first column. for example, i want the series of
subplots in the first column to take up 70% of the figure, and the
subplots in the second column to take up only 30%. is there a way to
do this?

i looked into plt.subplots_adjust but i do not know how to use that
function to get this desired effect.