shoplist = ["apple", "carrot", "banana", "abc"]

print("item 0 is ", shoplist[0])

print("item 1 is ", shoplist[1])

print("item 2 is ", shoplist[2])

print("item 3 is ", shoplist[3])

print("item -1 is ", shoplist[-1]) #最后一个元素

print("item -2 is ", shoplist[-2]) #倒数第二个

print("item 1 to 3 is", shoplist[1:3]);

print("item 2 to end is", shoplist[2:]);

print("item 1 to -1 is", shoplist[1:-1]);

print("item start to end is", shoplist[:]);

name = "swaroop"

print("characters 1 to 3 is", name[1:3])

print("characters 2 to end is", name[2:])

print("characters 1 to -1 is", name[1:-1])

print("characters start to end is", name[:])

'''

print("i have", len(shoplist), "items to purchase.")

print("This items are:")

for item in shoplist:

print(item)

print ("\nalso have to buy rice.")

shoplist.append("rice2")

print("my shopping list is now", shoplist)

print("i will sort my list now")

shoplist.sort(key=None, reverse=False)

print("my sorted shopping list is now", shoplist)

print("the first item i wil buy is", shoplist[0])

olditem = shoplist[0]

del olditem

print("i bought the", shoplist[0])

print("my shoppint list is now", shoplist)

'''