title: How can I set "hot code replace" when debugging python by pydev
body: <p>I used eclipse+pydev as my python ide. I can't find the similar option like java debugger's "hot code replace". </p>
  
  <p>That is when debugging a python file, I updated the code, and then save the code, it should trigger the hot code replace. Such that, I can see the changes without stop and restart debugging.</p>
  
  <p>Considering a=2, b=102,When I debugging at the line "c=a+b", I changed the line "b=102" to "b=100", and then save the code. I expect now the "b" should be 100 and c should be 102. But, the b is still 102 and c is still 104.</p>