如何从列表中删除随机元素并将其添加到python中的另一个列表中

Question

list = ['john','james','michael','david','william']

winner = []

如何从list删除随机项并将其添加到winner ？

Answer 1

winner.append(list.pop(random.randrange(0,len(list))))

To break this down:

random.randrange(0,len(list)) 

will generate a random number between zero and the length of your list inclusive. This will generate a random index in your list that you can reference.

list.pop(i)

This will remove the item at the specified index (i) from your list.

winner.append(x)

This will add an item (x) to the end of the winner list. If you want to add the item at a specific index, you can use

winner.insert(i,x) 

with i being the index to insert at and x being the value to insert.

If you want more information, a good reference is the python docs on data structures: https://docs.python.org/2/tutorial/datastructures.html

Answer 2

This selects a random item from a list of names names and adds it to another list winner . The chosen winner is then removed from the names .

import random
winner = []
names = ['john','james','michael','david','william']
winnerindex = random.randint(0,len(names)-1)
winner.append(names[winnerindex])
del names[winnerindex]
print winner, names

Answer 3

Simply use random.randint from index 0 to len(list) to get the index of the element of list and append it to winner.

import random
index = random.randomint(0, len(list)-1)
winner.append(list[index])
del list[index]