title: How to write real value of -2.12683575e-04 in a file (Python)
body: <p>I am currently working with really tiny values and when I try to write a value like <strong>-0.000212683575</strong> in a file, it write me <strong>-2.12683575e-04</strong>.
  The problem is that I would like to have this value <strong>-0.000212683575</strong> written in the file or a least this one <strong>-0.00021268</strong> if there are too much numbers.</p>
  
  <p>How could I do this ?</p>
  
  <p><strong>I use Python 2.7</strong></p>
  
  <p>Thank you very much</p>