ten_things = "Apples Oranges Crows Telephone Light Sugar"

print ("Wait there are not 10 things in that list. Let's fix that.")

stuff = ten_things.split(' ')
more_stuff = ["Day", "Night", "Song", "Frisbee", "Corn", "Banana", "Girl", "Boy"]

while len(stuff) != 10:
    next_one = more_stuff.pop()
    print ("Adding: ", next_one)
    stuff.append(next_one)
    print ("There are %d items now." % len(stuff))

print ("There we go: ", stuff)

print ("Let's do some things with stuff.")

print (stuff[1])
print (stuff[-1] )# whoa! fancy
print (stuff.pop())
print (' '.join(stuff)) # what? cool!
print ('#'.join(stuff[3:5]) )# super stellar!  用#将stuff中的第3个元素和第4个元素连接起来，[3:5]这个参数给出了要连接的元素在列表中的位置，注意不包括第5个元素。

Wait there are not 10 things in that list. Let's fix that.
Adding:  Boy
There are 7 items now.
Adding:  Girl
There are 8 items now.
Adding:  Banana
There are 9 items now.
Adding:  Corn
There are 10 items now.
There we go:  ['Apples', 'Oranges', 'Crows', 'Telephone', 'Light', 'Sugar', 'Boy', 'Girl', 'Banana', 'Corn']
Let's do some things with stuff.
Oranges
Corn
Corn
Apples Oranges Crows Telephone Light Sugar Boy Girl Banana
Telephone#Light