舉例講解Python中的list列表數據結構用法

hairs = ['brown', 'blond', 'red']
eyes = ['brown', 'blue', 'green']
weights = [1, 2, 3, 4]

the_count = [1, 2, 3, 4, 5] 
fruits = ['apples', 'oranges', 'pears', 'apricots'] 
change = [1, 'pennies', 2, 'domes', 3, 'quarters'] 
 
 
# this first kind of for-loop goes through a list 
for number in the_count: 
 print "This is count %d" % number 
 
 
# same as above 
for fruit in fruits: 
 print "A fruit of type: %s" % fruit 
 
 
# also we can go through mixed lists too 
# notice we have to use %r since we don't know what's in it 
for i in change: 
 print "I got %r" % i 
 
 
# we can also build lists, first start with an empty on 
elements = [] 
 
 
# then use the range function to do 0 to 5 counts 
for i in range(0, 6): 
 print "Adding %d to the list." % i 
 # append is a function that lists understand 
 elements.append(i) 
 
 
# now we can print them out too 
for i in elements: 
 print "Elements was: %d" % i 

root@he-desktop:~/mystuff# python ex32.py 

This is count 1
This is count 2
This is count 3
This is count 4
This is count 5
A fruit of type: apples
A fruit of type: oranges
A fruit of type: pears
A fruit of type: apricots
I got 1
I got 'pennies'
I got 2
I got 'domes'
I got 3
I got 'quarters'
Adding 0 to the list.
Adding 1 to the list.
Adding 2 to the list.
Adding 3 to the list.
Adding 4 to the list.
Adding 5 to the list.
Elements was: 0
Elements was: 1
Elements was: 2
Elements was: 3
Elements was: 4
Elements was: 5

animals = ['bear', 'tiger', 'penguin', 'zebra']
bear = animals[0]

animals = ['bear', 'python', 'peacock', 'kangaroo', 'whale', 'platypus']

The animal at 1.
The 3rd animal.
The 1st animal.
The animal at 3.
The 5th animal.
The animal at 2.
The 6th animal.
The animal at 4.

root@he-desktop:~# python
Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) 
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.

>>> class Thing(object):
... def test(hi):
... print "hi"
... 
>>> a = Thing()
>>> a.test("hello")
Traceback (most recent call last):
 File "", line 1, in 
TypeError: test() takes exactly 1 argument (2 given)
>>> 

ten_things = "Apples Oranges Crows Telephone Light Sugar" 
 
 
print "Wait there's 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 "Thing's %d items now." % len(stuff) 
 
 
print "There we go:", stuff 
 
 
print "Let's do some things with stuff." 
 
 
print stuff[1] 
print stuff[-1] # 
print stuff.pop() 
print ' '.join(stuff) 
print '#'.join(stuff[3:5]) 

root@he-desktop:~/mystuff# python ex38.py 

Wait there's not 10 things in that list, let's fix that.
Adding: Boy
Thing's 7 items now.
Adding: Girl
Thing's 8 items now.
Adding: Banana
Thing's 9 items now.
Adding: Corn
Thing's 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