CODEWITHSUNDEEP
pythonpython-3.x
BirdMan Jr
BirdMan Jr

Reputation: 1

"List index out of range" for list of lists

This is my code:

    import random

    fixed_set = random.sample(range(1, 11), 6)
    test = [[random.sample(range(1, 11), 6)] for x in range(5)]

    for x in range(5):
        for j in range(6):
            print (test[x][j])

In line 7 "print (test[x][j])" I get this error "IndexError: list index out of range" and I don't exactly understand why it is happening and how to fix it. Any help would be appreciated.

Upvotes: 0

Views: 390

Answers (4)

Rohit-Pandey
Rohit-Pandey

Reputation: 2159

import random
fixed_set = random.sample(range(1, 11), 6)  
test = [random.sample(range(1, 11), 6) for x in range(5)]
print (fixed_set)
print (test)
for x in range(5):
    for j in range(6):
        print (test[x][j])

This one helpful for you. You Have to make test lists of list carefully.

Another Method in which just change print method.

import random
fixed_set = random.sample(range(1, 11), 6)
test = [[random.sample(range(1, 11), 6)] for x in range(5)]
print (fixed_set)
print (test)
for x in range(5):
    for j in range(6):
        print (test[x][0][j])

There are some change in the print method according to your test list.

Upvotes: 0

I. Helmot
I. Helmot

Reputation: 1258

random.sample(range(1, 11), 6) returns a list itself and no need to use [] around that.

Try this:

import random

test = [random.sample(range(1, 11), 6) for x in range(5)]

for x in range(5):
    for j in range(6):
        print (test[x][j])

Upvotes: 1

Davide Alberani
Davide Alberani

Reputation: 1081

Try to debug your script.

The "test" variable is a list of lists of a single item which in turn is just a list of 6 integers in range 1-10 (inclusive).

For example:

[[[3, 2, 8, 9, 7, 6]], [[7, 1, 3, 2, 9, 5]], [[10, 9, 2, 4, 5, 1]], [[5, 7, 9, 3, 4, 1]], [[10, 9, 2, 7, 6, 3]]]

Is this what you want? Maybe you just want it to be a list of 6-elements lists; in which case, you have to remove the set of squares around [random.sample(range(1, 11), 6)]

By the way: fixed_set is never used, in your code.

Upvotes: 0

Mohamed Ali JAMAOUI
Mohamed Ali JAMAOUI

Reputation: 14689

random.sample(range(1, 11), 6) is already returning a list, yet you are wrapping it with another list in [[random.sample(range(1, 11), 6)] for x in range(5)], so change that line to this [random.sample(range(1, 11), 6) for x in range(5)] and your code should be fine: 

import random

fixed_set = random.sample(range(1, 11), 6)
test = [random.sample(range(1, 11), 6) for x in range(5)]

for x in range(5):
    for j in range(6):
        print (test[x][j])

Upvotes: 0

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