title: Get substring between two spesific characters in python
body: <p>I am really confused that can't write a code that do this for me.
  Look This is my string:</p>
  
  <blockquote>
    <p>a="hello | my friends| in | stack | over | flow" </p>
  </blockquote>
  
  <p>I want to print "my friends" which is between first and second "|"
  Please help me</p>