title: csv to sparse matrix in python
body: <p>I have a big csv file which lists connections between nodes in a graph. example:</p>
  
  <p>0001,95784<br>
  0001,98743<br>
  0002,00082<br>
  0002,00091  </p>
  
  <p>So this means that node id 0001 is connected to node 95784 and 98743 and so on.
  I need to read this into a sparse matrix in numpy. How can i do this?
  I am new to python so tutorials on this would also help.</p>