title: How can I select multiple data points with matplotlib and export it?
body: <p>I use matplotlib in combiantion with pandas.
  It happens often that I plot several data points and I would like to select some of the points with a something like lasso tool and save this information as some kind of annotation.</p>
  
  <p>For example:
  Lets say I plot the data of this dataframe:</p>
  
  <pre><code>        Age Score
  John    18  30
  Maria   11  28
  Paul    20  22
  Frank   15  10  
  Jade    18  30
  Kim     30  25
  ...     ..  ..
  </code></pre>
  
  <p>I would like to select with a lasso kind of tool the area low Age high Score I am interested about.
  So that, in the end, with some manipulation I could get something like that:</p>
  
  <pre><code>    Age Score   GoodCandidate
  John    18  30  True    
  Maria   20  28  True
  Paul    60  22  False
  Frank   19  10  False
  Jade    18  30  True
  Kim     40  25  False
  ...     ..  ..   ...
  </code></pre>
  
  <p>Suggestions how to do that?</p>