Python:random usage

>>import Random
>>print (Random.random ()) #生成0-1 random number
>>print (Random.randint (1,7)) #生成1-7 random number, including 1 and 7
>>print (Random.randrange (1,100,4)) #生成1-100, a random number in the base of 4, such as: 1,4,8,12,16 .... such as
>>random.choice ("Hello World") #从字符串序列中随机生成一个字母, such as: H,w,r,l,e, etc.
>>random.choice ([' Hello ', ' world ', ' Hi ', ' you ', ' Java '])
>>print (Random.sample ([1,3,5,7,9,12],3)) #从序列中随机取3个数, i.e. [1,5,7]
>>print (random.sample (' Hello World ', 3))

#洗牌

>>items=[1,2,3,4,5,6,7]
>>print (items)
[1,2,3,4,5,6,7]
>>random.shuffle (items)
>>print (items)
[2,5,7,4,6,3,1]

Python:random usage