title: Two y-axis on the left side of the figure
body: <p>I want to plot curves with different y-axis that share the same x-axis. I have used the <code>twinx</code> function before, but it plot them on different side of the figure. Is there a way to plot both of them on the left hand side. I am looking for something like the following<img src="https://i.stack.imgur.com/NJt5H.png" alt="enter image description here"></p>
  
  <p>but with both the axis on the same side. The code for the above example is <a href="http://matplotlib.org/examples/pylab_examples/multiple_yaxis_with_spines.html" rel="noreferrer">here</a>.</p>
  
  <p>On a different not, can one plot the curves in some particular order, as z-order do not work for <code>twinx</code></p>