Choose 5 different elements from a list?

What is the best way to choose 5 different elements from a python list and add开发者_JS百科 them to a new list?

Thanks for the help!

Assuming that you want them chosen randomly and that new_list is already defined,

import random

new_list += random.sample(old_list, 5)

If new_list is not already defined, then you can just do

new_list = random.sample(old_list, 5)

If you don't want to change new_list but want to instead create new_new_list, then

new_new_list = new_list + random.sample(old_list, 5)

Now references to new_list will still access a list without the five new elements but new_new_list will reference a list with the five elements.

Use random.sample call

import random
random.sample(yourlist,5)

You may need to be more specific, but to return 5 unique elements from your list you can simply use sample from the random module

import random
num = 5
aList = range(30)
newList = []
newList+=random.sample(aList, num)

>>> list = [1,3,6,3,2,5,7,4,7,8,9,4,3,2,4,6,7]
>>> newlist = []
# Pick 5 and add to new list:
>>> newlist.extend(list[:5])
>>> newlist
[1, 3, 6, 3, 2]