我有一个列表列表,稍后我想把它变成一本字典。问题是列表的列表非常不规则:对于一个键,存在 1 到 4 个列表,其中的数字属于该键。原始数据集存储在 json 中。这是一个示例数据集:
data = [36146779,
[17628,35633, 2847385, 71393, 41814],[51068348,49722,3255134,66598],[103475099, 1337536, 1136863360,257],
22971125,
[230806,116805,118456,9031, 3573662],[719279707,299836,40722,35134,668],[1337536, 1136863360,257],
111125168,
[719279707,299836,40722,35138],[17628,35633, 2847385],
71280747,
[806,116805,11845],[17628,35633, 2847385]]
我能够完全展平列表列表,但我无法将这个平面列表变成具有给定键的字典
ex_eco = ["36146779","22971125","111125168","71280747"]
(我确信也可以直接将第一个嵌套列表转成字典,但我找不到解决方案,所以我尝试了这种方式)
def flatten(l):
out = []
for item in l:
if isinstance(item, (list, tuple)):
out.extend(flatten(item))
else:
out.append(item)
return out
flattened_eco = flatten(data)
print(flattened_eco[0:100])
我得到的是一个平面列表:
[36146779, 17628, 35633, 2847385, 71393, 41814, 51068348, 49722, 3255134, 66598, 103475099, 1337536, 1136863360, 257, 22971125, 230806, 116805, 118456, 9031, 3573662, 719279707, 299836, 40722, 35134, 668, 1337536, 1136863360, 257, 111125168, 719279707, 299836, 40722, 35138, 17628, 35633, 2847385, 71280747, 806, 116805, 11845, 17628, 35633, 2847385]
我需要的是这样的:
[36146779,
[17628,35633, 2847385, 71393,41814,51068348,49722,3255134,66598,103475099,1337536, 1136863360,257],
22971125,
[230806,116805,118456,9031,573662,719279707,299836,40722,35134,668,1337536, 1136863360,257],
111125168,
[719279707,299836,40722,35138,17628,35633, 2847385],
71280747,
[806,116805,11845,17628,35633, 2847385]
]
import itertools
def flatten(data):
flattened = []
for key, value in itertools.groupby(data, type):
if key == int:
flattened.append(next(value))
else:
flattened.append(list(itertools.chain.from_iterable(value)))
return flattened
例子
>>> data = [36146779,
[17628,35633, 2847385, 71393, 41814],[51068348,49722,3255134,66598],[103475099, 1337536, 1136863360,257],
22971125,
[230806,116805,118456,9031, 3573662],[719279707,299836,40722,35134,668],[1337536, 1136863360,257],
111125168,
[719279707,299836,40722,35138],[17628,35633, 2847385],
71280747,
[806,116805,11845],[17628,35633, 2847385]]
>>> flatten(data)
[36146779,
[17628, 35633, 2847385, 71393, 41814, 51068348, 49722, 3255134, 66598, 103475099, 1337536, 1136863360, 257],
22971125,
[230806, 116805, 118456, 9031, 3573662, 719279707, 299836, 40722, 35134, 668, 1337536, 1136863360, 257],
111125168,
[719279707, 299836, 40722, 35138, 17628, 35633, 2847385],
71280747,
[806, 116805, 11845, 17628, 35633, 2847385]]
要更进一步并创建字典,只需将函数的最后一行更改为 dict
comprehension
def dictify(data):
flattened = []
for key, value in itertools.groupby(data, type):
if key == int:
flattened.append(next(value))
else:
flattened.append(list(itertools.chain.from_iterable(value)))
return {key:value for key,value in zip(flattened[::2], flattened[1::2])}
>>> dictify(data)
{36146779: [17628, 35633, 2847385, 71393, 41814, 51068348, 49722, 3255134, 66598, 103475099, 1337536, 1136863360, 257],
22971125: [230806, 116805, 118456, 9031, 3573662, 719279707, 299836, 40722, 35134, 668, 1337536, 1136863360, 257],
111125168: [719279707, 299836, 40722, 35138, 17628, 35633, 2847385],
71280747: [806, 116805, 11845, 17628, 35633, 2847385]}
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