list2.py

#! /usr/bin/python
# coding: UTF-8

list = [100,200,300]

list.sort()
list.reverse()

print list

d="2015/10/1"


print d.split("/")

a = [ "a", "b", "c" ]
print "-".join(a)

b = [ 1, 2, 3, 4 ]
print "-".join( str(b) )