我想在每個(gè)級(jí)別展平以下 JSON 并為每個(gè)級(jí)別創(chuàng)建一個(gè) pandas 數(shù)據(jù)框，flatten_json我曾經(jīng)這樣做過(guò)，但為此我需要遍歷每個(gè)級(jí)別，從而創(chuàng)建多個(gè)嵌套的 for 循環(huán)：{"metadata": { "name": "abc", "time": "2020-04-01"},"data": [ { "identifiers": [ { "type": "abc", "scheme": "def", "value": "123" }, { "type": "abc", "scheme": "def", "value": "123" } ], "name": "qwer", "type": "abd", "level1": [ { "identifiers": [ { "type": "abc", "scheme": "def", "value": "123" }, { "type": "abc", "scheme": "def", "value": "123" } ], "name": "asd", "type": "abd", "level2": [ { "identifiers": [ { "type": "abc", "scheme": "def", "value": "123" }, { "type": "abc", "scheme": "def", "value": "123" } ], "name": "abs", "type": "abd" },
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我使用遞歸解決了它，這是我的代碼：
import json
import pandas as pd
import flatten_json as fj
keys = {'data', 'level1', 'level2', 'level3'}
with open('test_lh.json') as f:
data = json.load(f)
levels = ['data.level1.level2.level3', 'data.level1.level2', 'data.level1', 'data']
recs_dict = {}
def do_step(data_dict, level, depth, path):
recs = []
for x in data_dict[level]:
if depth < len(path.split('.'))-1:
do_step(x, path.split('.')[depth+1], depth+1, path)
else:
dic = fj.flatten(x, root_keys_to_ignore=keys)
recs.append(dic)
recs_dict[level] = recs
for path in levels:
do_step(data, path.split('.')[0], 0, path)
for key, value in recs_dict.items():
print(key)
df = pd.DataFrame(recs_dict[key])
print(df)
這是輸出：
level3
identifiers_0_type identifiers_0_scheme identifiers_0_value identifiers_1_type identifiers_1_scheme identifiers_1_value name type
0 abc def 123 abc def 123 abs level3
1 abc def 123 abc def 123 abs level3
level2
identifiers_0_type identifiers_0_scheme identifiers_0_value identifiers_1_type identifiers_1_scheme identifiers_1_value name type
0 abc def 123 abc def 123 abs level2
1 abc def 123 abc def 123 abs abd
level1
identifiers_0_type identifiers_0_scheme identifiers_0_value identifiers_1_type identifiers_1_scheme identifiers_1_value name type
0 abc def 123 abc def 123 asd level1
data
identifiers_0_type identifiers_0_scheme identifiers_0_value identifiers_1_type identifiers_1_scheme identifiers_1_value name type
0 abc def 123 abc def 123 qwer abd
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