Python - create many lists with random values

Question

I want many (hundreds) of lists in python that follow this form:

[random.randint(1,100), random.randint(50, 100), random.randint(10,20), random.randint(1,100)]

And I want to name them list1, list2, list3, etc. all the way up to list500, list501, etc.

Is there a way to automate that all? Or should I not be using lists?

@aruisdante Sorry, I meant I want to name them those. Essentially concatenate the word "list" with the numbers hundreds of times. — japem, Dec 13 '14 at 20:10
Why would you want to have 500 separate variables? Just put them all in a list. — poke, Dec 13 '14 at 20:12
@poke it is much more organized the way I want to do it. I could, but it would be a real pain. — japem, Dec 13 '14 at 20:14

score 1 · Answer 1 · answered Dec 13 '14 at 20:14

1

try this:

 my_lists = [[random.randint(1,100), random.randint(50, 100), random.randint(10,20), random.randint(1,100)] for x in range(500)]

demo for 5:

>>> my_lists [[random.randint(1,100), random.randint(50, 100), random.randint(10,20), random.randint(1,100)] for x in range(5)]
>>> my_lists
[[98, 58, 15, 63], [69, 59, 12, 37], [62, 58, 16, 7], [55, 97, 17, 55], [98, 53, 14, 90]]

answered Dec 13 '14 at 20:14

Hackaholic

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what about the name of the list ? the OP what to assign the list to a name ! – Mazdak Dec 13 '14 at 20:16
That works. It doesn't exactly create separate lists, which is what I ideally wanted, but it's good enough. Thanks. – japem Dec 13 '14 at 20:17
no need to create saperate list you can access the nested list by index, creating another variable is not good idea – Hackaholic Dec 13 '14 at 20:17
@japem you need to use a dictionary – Mazdak Dec 13 '14 at 20:17
1

its like index 0 is list1, index 1 is list2 and so one – Hackaholic Dec 13 '14 at 20:18
@Kasra it's ok to have them be list[0], list[1] and so on instead of list1, list2, etc. – japem Dec 13 '14 at 20:18

score 0 · Answer 2 · answered Dec 13 '14 at 20:11

Here's a simple snippet that will created 'named' lists inside a dict:

rand_lists = dict(('list{}'.format(i), [random.randint(1,100), random.randint(50, 100), random.randint(10,20), random.randint(1,100)]) for i in xrange(1,501))
rand_lists['list437']
>>> [3,52,12,90]

Python - create many lists with random values

2 Answers2