笨办法32循环和列表

 1 fruits = [‘apples‘, ‘oranges‘, ‘pears‘, ‘apricots‘]
 2 change = [1, ‘pennies‘, 2, ‘dimes‘, 3, ‘quarters‘]
 3 
 4 # this first kind of for-loop goes through a list
 5 for number in the_count:
 6     print "This is count %d" % number
 7 
 8 # same as above
 9 for fruit in fruits:
10     print "A fruit of type: %s" % fruit
11 
12 # also we can go through mixed lists too
13 # notice we have to use %r since we don‘t know what‘s in it
14 for i in change:
15     print "I got %r" % i
16 
17 # we can also build lists, first start with an empty one
18 elements = []
19 
20 # then use the range function to do 0 to 5 counts
21 for i in range(0, 6):
22     print "Adding %d to the list." % i
23     # append is a function that lists understand
24     elements.append(i)
25 
26 # now we can print them out too
27 for i in elements:
28     print "Element was: %d" % i

1.append 
用于在列表末尾追加新的对象：
>>> lst = [1, 2, 3]
>>> lst.append(4)
>>> lst
[1, 2, 3, 4]

2.count
统计某个元素在列表中出现的次数：
>>> [‘to‘,‘be‘,‘or‘,‘not‘,‘to‘,‘be‘].count(‘to‘)
2
>>> x =[[1,2],1,1,[2,1,[1,2]]]
>>> x.count(1)
2
>>> x.count([1,2])
1

3.extend
在列表的末尾一次性追加另一个序列中的多个值