Matplotlib transparent line plots

Question

I am plotting two similar trajectories in matplotlib and I\'d like to plot each of the lines with partial transparency so that the red (plotted second) doesn\'t obscure the

Answer 1

After I plotted all the lines, I was able to set the transparency of all of them as follows:

for l in fig_field.gca().lines:
    l.set_alpha(.7)

EDIT: please see Joe's answer in the comments.

Answer 2

Plain and simple:

plt.plot(x, y, 'r-', alpha=0.7)

(I know I add nothing new, but the straightforward answer should be visible).

Answer 3

It really depends on what functions you're using to plot the lines, but try see if the on you're using takes an alpha value and set it to something like 0.5. If that doesn't work, try get the line objects and set their alpha values directly.