前提：需要导入random模块
>>>import random
1、产生 0.0 <= x < 1.0的随机小数
>>> random.random() # Random float x,
0.37444887175646646
2、产生 1.0 <= x < 10.0的随机小数
>>> random.uniform(1, 10) # Random float x,
1.1800146073117523
3、随机产生10到100的整数
>>> random.randint(10, 100)
56
4、选择一个随机元素
>>> random.choice('abcdefghij') # Choose a random element
'c'
5、洗牌：
>>> items = ['a','b','c','d','e','f']
>>> random.shuffle(items)
>>> items
['e', 'c', 'b', 'd', 'f', 'a']
6、从一个列表中选择指定个数的元素组成新列表
>>> random.sample([1, 2, 3, 4, 5], 3) # Choose 3 elements
[4, 1, 5]
多个字符中选取特定数量的字符组成新字符串：
>>> import random
>>> import string
>>>sample_list = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9']
>>>string.join(random.sample(sample_list,6)).replace(" ","")
'kqf2bl'
参考资料：http://docs.python.org/library/random.html
