title: Grouped boxplot with seaborn
body: <p>I have following data in python panda DataFrame. I would like to have grouped box plot similar to one in <a href="https://stanford.edu/~mwaskom/software/seaborn/examples/grouped_boxplot.html" rel="nofollow">https://stanford.edu/~mwaskom/software/seaborn/examples/grouped_boxplot.html</a></p>
  
  <p>For each id, I would like to have two box plots plotted side by side. How do i achieve this. I tried plotting it with the seaborn package but without any success. </p>
  
  <pre><code>id               predicted                              real
  1            [10, 10, 10]                      [16, 18, 20]   
  2            [12, 12, 15]              [15, 17, 19, 21, 23]
  3           [20, 5, 4, 4]                          [29, 32]
  4    [25, 25, 25, 24, 21]  [21, 24, 25, 26, 28, 29, 30, 33]
  5        [20, 20, 20, 21]  [21, 22, 24, 26, 28, 30, 31, 32]
  6           [8, 3, 3, 14]                          [25, 27]
  7  [1, 4, 4, 4, 5, 6, 10]                      [69, 71, 72]
  8        [11, 11, 11, 11]              [19, 21, 22, 23, 24]
  9            [7, 6, 9, 9]                  [19, 26, 27, 28]
  10    [30, 30, 30, 30, 30]                          [38, 39]
  </code></pre>