title: What is the python analogy to splot pm3d map in gnuplot?
body: <p>I have a file 'data', which is formatted for splot in gnuplot.</p>
  
  <pre><code>x1 y1 z11
  x1 y2 z12
  ... 
  x1 yn z1n
  ...
  xn yn-1 znn-1
  xn yn znn
  </code></pre>
  
  <p>In gnuplot I use </p>
  
  <pre><code>set pm3d map
  splot 'data' u 1:2:3
  </code></pre>
  
  <p>to produce a heatmap of my data.</p>
  
  <p>How can I proceed to plot the same with python?</p>