text: # len() and repr()
  
  l = []
  print len(l)
  l.append(1)
  print len(l)
  
  print len("hello world")
  
  print repr("hello 2")
  print repr(1)
  print repr
  print repr(repr)
  print str
  print len
  print str(str)
  
  class C(object):
      def __init__(self, n):
          self.n = n
      def __len__(self):
          return self.n
  
  print len(C(1))
  print len(1)
  print len(C("hello world"))
  