How to create a list of random integers in python ?

Examples of how to create a list of random integers in python:

Using the function randint

The python function randint can be used to generate a random integer in a chosen interval [a,b]:

>>> import random
>>> random.randint(0,10)
7
>>> random.randint(0,10)
0

A list of random numbers can be then created using python list comprehension approach:

>>> l = [random.randint(0,10) for i in range(5)]
>>> l
[4, 9, 8, 4, 5]

Using the function randrange

Another solution is to use randrange function (except that can specify a step if you need):

>>> l = [random.randrange(0,10) for i in range(5)]
>>> l
[1, 7, 4, 3, 1]
>>> l = [random.randrange(0,10,2) for i in range(5)]
>>> l
[2, 4, 4, 6, 0]

Using the function sample

To create a list of random numbers with no repetition, a solution is to use random.sample function

>>> l = random.sample(range(1,100), 10)
>>> l
[89, 56, 87, 51, 46, 25, 52, 44, 10, 32]

References