code: def all(self, func=None):
          
          if func is None:
              func = lambda x, *args: x
          self.altmp = True
  
          def testEach(value, index, *args):
              if func(value, index, *args) is False:
                  self.altmp = False
  
          self._clean.each(testEach)
          return self._wrap(self.altmp)
docs: Determine whether all of the elements match a truth test.