[python] TypeError : ‘dict_keys’개체가 인덱싱을 지원하지 않습니다

def shuffle(self, x, random=None, int=int):
    """x, random=random.random -> shuffle list x in place; return None.

    Optional arg random is a 0-argument function returning a random
    float in [0.0, 1.0); by default, the standard random.random.
    """

    randbelow = self._randbelow
    for i in reversed(range(1, len(x))):
        # pick an element in x[:i+1] with which to exchange x[i]
        j = randbelow(i+1) if random is None else int(random() * (i+1))
        x[i], x[j] = x[j], x[i]

shuffle함수를 실행할 때 다음 오류가 발생합니다. 왜 그럴까요?

TypeError: 'dict_keys' object does not support indexing

답변

next(iter(keys))

items = iter(keys)
while True:
    try:
        item = next(items)
    except StopIteration as e:
        pass # finish

import random

d1 = {0:'zero', 1:'one', 2:'two', 3:'three', 4:'four',
     5:'five', 6:'six', 7:'seven', 8:'eight', 9:'nine'}

keys = list(d1)
random.shuffle(keys)

d2 = {}
for key in keys: d2[key] = d1[key]

print(d1)
print(d2)