title: find if string1 is contained in string2 in python
body: <p>I have two strings: <code>string1 = ABCDE</code> and <code>string2 = BC</code>.</p>
  
  <p>I hope to write a program returning a T/F value for whether string2 is contained in string1. For the example above, the function should return True. I know it's something like the <code>%in%</code> function in <code>R</code>, but since I am a newbie in Python, please share your thoughts on this simple question.</p>
  
  <p>Thanks!</p>