title: ipython shell awk : Escaping "$" sign
body: <p>I am figuring out the Ipython shell support. Its seems awk doesn't work  i.e 
  following command </p>
  
  <pre><code>!ls -l | awk '{print $1}' 
  </code></pre>
  
  <p>just prints "1". </p>
  
  <p>How do I pass the "$" sign correctly to shell. I am using zsh. </p>