def __getitem__(self, i) :
		"""returns the ith entry"""
		if self.lines[i].__class__ is not GTFEntry :
			self.lines[i] = GTFEntry(self, i)
		return self.lines[i]
def __getitem__ ( self , i ) : if self . lines [ i ] . __class__ is not GTFEntry : self . lines [ i ] = GTFEntry ( self , i ) return self . lines [ i ]
returns the ith entry