CODEWITHSUNDEEP
pythonrandomrange
Khánh Đinh Ngọc
Khánh Đinh Ngọc

Reputation: 105

How to get two different random samples from one range

I want to get get two different random samples from one range in python.
I tried something like this: 

rd1 = random.sample(range(0, 10), 5) 
rd2 = random.sample(range(0, 10), 5)
print(rd1)
print(rd2)

Output:

[2, 4, 7, 6, 8]
[2, 4, 0, 7, 5]

But i want rd1 and rd2 to have no common elements like:

[1, 3, 9, 6, 8]
[2, 4, 0, 7, 5]

or 

[0, 2, 9, 6, 1]
[3, 4, 8, 7, 5]

Upvotes: 2

Views: 1057

Answers (2)

wjandrea
wjandrea

Reputation: 32964

Get one sample of twice the length, then split it in half, something like this:

rd = random.sample(range(0, 10), 10)
rd1, rd2 = rd[:5], rd[5:]
print(rd1)
print(rd2)

Example output:

[5, 7, 1, 6, 3]
[2, 9, 4, 8, 0]

BTW you could also use random.shuffle to get rd:

rd = list(range(0, 10))
random.shuffle(rd)

Upvotes: 0

Ahmed Soliman
Ahmed Soliman

Reputation: 1710

random takes an iterable so generate the first list and then do a small filtering to exclude the items from the first random list :

import random
rd1  = random.sample(range(0, 10), 5)

rd2  = random.sample([i for i in range(0, 10) if i not in rd1], 5)

print(rd1)
print(rd2)

Output:

[2, 6, 9, 5, 0]
[4, 1, 3, 8, 7]

Upvotes: 3

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