title: Python write in mkstemp() file
body: <p>I am creating a tmp file by using :</p>
  
  <pre><code>from tempfile import mkstemp
  </code></pre>
  
  <p>I am trying to write in this file :</p>
  
  <pre><code>tmp_file = mkstemp()
  file = open(tmp_file, 'w')
  file.write('TEST\n')
  </code></pre>
  
  <p>Indeed I close the file and do it proper but when I try to cat the tmp file, it stills empty..It looks basic but I don't know why it doesn't work, any explanations ?</p>