如何从json提取数据?

Question

使用以下代码，我提取此输出，但如何从输出中提取所有['_id'] ?

def geneinfo(gene):
url = 'http://mygene.info/v3/query?q='+gene
r = requests.get(url)
return r.json()['hits']
geneinfo('cdk2')

输出:

[{'_id': '1017',
'_score': 442.42224,
'entrezgene': '1017',
'name': 'cyclin dependent kinase 2',
'symbol': 'CDK2',
'taxid': 9606},
{'_id': '12566',
'_score': 371.0638,
'entrezgene': '12566',
'name': 'cyclin-dependent kinase 2',
'symbol': 'Cdk2',
'taxid': 10090},
{'_id': '362817',
'_score': 313.97708,
'entrezgene': '362817',
'name': 'cyclin dependent kinase 2',
'symbol': 'Cdk2',
'taxid': 10116},
{'_id': '109992509',
'_score': 285.43372,
'entrezgene': '109992509',
'name': 'cyclin-dependent kinase 2',
'symbol': 'cdk2',
'taxid': 56723},
{'_id': '115358851',
'_score': 285.43372,
'entrezgene': '115358851',
'name': 'cyclin-dependent kinase 2',
'symbol': 'cdk2',
'taxid': 586833},
{'_id': '101675892',
'_score': 285.43372,
'entrezgene': '101675892',
'name': 'cyclin dependent kinase 2',
'symbol': 'CDK2',
'taxid': 9669},
{'_id': '105531943',
'_score': 285.43372,
'entrezgene': '105531943',
'name': 'cyclin dependent kinase 2',
'symbol': 'CDK2',
'taxid': 9568},
{'_id': 'ENSLCAG00010025960',
'_score': 285.43372,
'name': 'cyclin-dependent kinase 2',
'symbol': 'cdk2',
'taxid': 8187},
{'_id': 'ENSLCAG00010026017',
'_score': 285.43372,
'name': 'cyclin-dependent kinase 2',
'symbol': 'cdk2',
'taxid': 8187},
{'_id': 'ENSLOCG00000004109',
'_score': 285.43372,
'name': 'cyclin dependent kinase 2',
'symbol': 'cdk2',
'taxid': 7918}]

Answer 1

如果data是您的问题的输出，您可以:

out = [d["_id"] for d in data]
print(out)

打印:

[
"1017",
"12566",
"362817",
"109992509",
"115358851",
"101675892",
"105531943",
"ENSLCAG00010025960",
"ENSLCAG00010026017",
"ENSLOCG00000004109",
]