[julia-users] using PyPlot

[wgao1]

<https://lh3.googleusercontent.com/-2TV7vQ2amoU/VZsI3F3JmYI/AAAAAAAAAAM/ZRlXuwQGShA/s1600/problem.png>
Hi, julia-users
when I type "using PyPlot", it shows error message in the picture, anyone 
know how to fix it? Thanks