title: scanning user input in python
body: <pre><code>direction = input("enter a direction: ")
  if direction != "quit" and direction != "go north" and direction != "go south" and direction != "go east" and direction != "go west" and direction != "go up" and direction != "go down" and direction != "look":
      print ("please enter in the following format, go (north,east,south,west,up,down)")
  
  elif direction == "quit":
      print ("OK ... but a small part of you may never leave until you have personally saved Muirfieland from the clutches of evil .. Bwahahahahahah (sinister laugh) ... the game should then end.")
  
  elif direction == "look":
      print ("You see nothing but endless void stretching off in all directions ...")
  
  else:
      print ("You wander of in the direction of " + direction)
  </code></pre>
  
  <p>i need to know how to do this in python.
  i need to scan user inputs first 2 letters
  for example</p>
  
  <pre><code>i = user_input
  #user inputs go ayisgfdygasdf
  </code></pre>
  
  <p>i need it to be able to scan the user input, check if the first 2 letters are go, and if they are go but it doesnt recognise the second word which in this case is "ayisgfdygasdf" then to print "sorry, i cant do that"</p>