#!/usr/bin/env python

 # -*- coding:utf-8 -*-

 __author__ = "loki"

 # function: Modeled range

 from collections import Iterable, Iterator

 class Range:

     def __init__(self, start, stop, step=1):

         self.num = start

         self.stop = stop

         self.jump = step

     def __iter__(self):

         return self

     def __next__(self):

         if self.num >= self.stop:

             raise StopIteration

         n = self.num

         self.num += 1

         if self.jump > 1:  # step > 1

             n = n * self.jump

             if n <= self.stop:

                 return n

             else:

                 raise StopIteration

         return n  # default step

 f = Range(0, 12, 2)

 f1 = range(0, 12, 2)

 # print(isinstance(f, Iterable))

 # print(isinstance(f, Iterator))

 # for item in f:       <---这个地方把值取空了，自然获得的list的结果是空列表了 - -|||

 #     print(item)

 print(type(f))

 print(list(f))

 print('---------分割线-------------')

 print(type(f1))

 print(list(f1))

 print(dir(f))

 print(dir(f1))