code: def push_front(self, value):
          '''Appends a copy of ``value`` to the beginning of the list.'''
          self.cache.push_front(self.value_pickler.dumps(value)f push_front(self, value):
          '''Appends a copy of ``value`` to the beginning of the list.'''
          self.cache.push_front(self.value_pickler.dumps(value))
docs: Appends a copy of ``value`` to the beginning of the list.