如何在python中从Elasticsearch访问索引值

我将3个json对象从一个数组转储到一个

localhost

Elasticsearch索引

“amazon”

当我访问

localhost

中的索引时，它显示了这个输出

{"amazon":{"aliases":{},"mappings":{"product-title":{"properties":{"images":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}},"price":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}},"title":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}}}}},"settings":{"index":{"creation_date":"1538923579981","number_of_shards":"5","number_of_replicas":"1","uuid":"SQ83_ecZSn6x9mDsGj9KLQ","version":{"created":"6040299"},"provided_name":"amazon"}}}}

我想从python代码中访问

“title”

、

“price”

和

“images”

的值。我该怎么做呢？

您的输出（我们称之为

d

）是一本字典。您可以提取嵌套字典结构的分支并查询其键：

properties = d['amazon']['mappings']['product-title']['properties']

title = properties['title']
price = properties['price']
images = properties['images']

print(title, price, images, sep='\n')

{'type': 'text', 'fields': {'keyword': {'type': 'keyword', 'ignore_above': 256}}}
{'type': 'text', 'fields': {'keyword': {'type': 'keyword', 'ignore_above': 256}}}
{'type': 'text', 'fields': {'keyword': {'type': 'keyword', 'ignore_above': 256}}}