code: def popitem(self, last=True):
          '''od.popitem() -> (k, v), return and remove a (key, value) pair.
          Pairs are returned in LIFO order if last is true or FIFO order if false.
  
          '''
          if not self:
              raise KeyError('dictionary is empty')
          key = next(reversed(self) if last else iter(self))
          value = self.pop(key)
          return key, valuf popitem(self, last=True):
          '''od.popitem() -> (k, v), return and remove a (key, value) pair.
          Pairs are returned in LIFO order if last is true or FIFO order if false.
  
          '''
          if not self:
              raise KeyError('dictionary is empty')
          key = next(reversed(self) if last else iter(self))
          value = self.pop(key)
          return key, value
docs: od.popitem() -> (k, v), return and remove a (key, value) pair.
          Pairs are returned in LIFO order if last is true or FIFO order if false.