getitem helper class for iterables

class getitem:
     """
     Helper class to gain key/index access
     of sequences and generators.
     """
     def __init__(self, iterable):
         self.iterable = iterable
     def __getitem__(self, index):
         if iter(self.iterable) is iter(self.iterable):
             for n,i in enumerate(self.iterable):
                 if n == index:
                     return i
         else:
             return self.iterable[index]
     def __repr__(self):
         return str(self.iterable)
     def __str__(self):
         return str(self.iterable)