title: What would the following line of code do `eval("os.system('clear')", {})`?
body: <p>I've heard that this is disastrous. Why?</p>
  
  <pre><code>import os
  eval("os.system('clear')", {})
  </code></pre>
  
  <h3>EDIT :</h3>
  
  <p>Added <code>import os</code>. Think of the code as being a  few lines a larger program. All of the necessary imports are in place, etc....</p>