title: What does Python's eval() do?
body: <p>In the book that I am reading on Python, it keeps using the code <code>eval(input('blah'))</code> </p>
  
  <p>I read the documentation, and I understand it, but I still do not see how it changes the <code>input()</code> function. </p>
  
  <p>What does it do? Can someone explain?</p>