title: Where to put imports in an iPython notebook?
body: <p>I am a Python programmer, new to IPython notebook. </p>
  
  <p>I have started a notebook that requires me to use the <code>csv</code> module in several cells. </p>
  
  <p>It seems that I have to import the module separately for each cell. I can't just put <code>import csv</code> at the top of the notebook, I have to write it once in each cell. </p>
  
  <p>Is that correct? It seems very clunky if so, suspect I've missed something obvious!</p>