title: How to find more than one substring from a string in Python
body: <p>For example if i have a string 'ATGAGGGATAGAGGGTTGGGAGAGATGGATAGGGGATAGATTG'
  i have to get substring between ATG and TTG , as we can see there are two of these kinds in a string. </p>
  
  <p>I am not able to figure out anyway to do it , plz help me thru it!</p>