The Python random module is commonly used

import random

print random.random()

Gets a floating point number less than 1

import random

random.randint(1,10)

Gets an integer from 1 to 10

import random

print random.uniform(0,2)

Gets a floating point number greater than 0 and less than 2

import random

print random.randrange(1,10,4)

Gets a random number with a size of 4 in steps 1 to 10

import random

a=[1,2,3,4,5]

random.choice(a)

Pick a random element from list a

import random

a=[1,2,3,4,5]

random.shuffle(a)

Shuffle the order of the elements in list a

import random

a=[1,2,3,4,5]

random.sample(a,3)

Pick 3 elements from list a in random order (an element can only be pulled out once, so the number of elements to pull out must not be greater than the number of elements in the list)