【Python3】jsonpath-rw處理Json對象

原文：https://www.cnblogs.com/shapeL/p/9106437.html

前提：接口自動化測試中，存在依賴情況：test_02的某個請求參數的值，需要依賴test_01返回結果中某個字段的數據，所以就先需要拿到返回數據中特定字段的值。這里使用到python中jsonpath-rw庫

1.下載安裝

pip install jsonpath-rw

2.導入

from jsonpath_rw import jsonpath,parse

3.例子介紹

1.返回的match數據，但我們想要的是value數據

data = {'foo': [{'baz': 'news'}, {'baz': 'music'}]}
print([match for match in jsonpath_expr.find(data)])

運行結果：
[DatumInContext(value='news', path=Fields('baz'), context=DatumInContext(value={'baz': 'news'}, path=<jsonpath_rw.jsonpath.Index object at 0x025CA850>, context=DatumInContext(value=[{'baz': 'news'}, {'baz': 'music'}], path=Fields('foo'), context=DatumInContext(value={'foo': [{'baz': 'news'}, {'baz': 'music'}]}, path=This(), context=None)))), DatumInContext(value='music', path=Fields('baz'), context=DatumInContext(value={'baz': 'music'}, path=<jsonpath_rw.jsonpath.Index object at 0x025CA770>, context=DatumInContext(value=[{'baz': 'news'}, {'baz': 'music'}], path=Fields('foo'), context=DatumInContext(value={'foo': [{'baz': 'news'}, {'baz': 'music'}]}, path=This(), context=None))))]

2.獲取匹配的數據match.value

jsonpath_expr = parse('foo[*].baz')
data = {'foo': [{'baz': 'news'}, {'baz': 'music'}]}
print([match.value for match in jsonpath_expr.find(data)])
運行結果：
['news', 'music']

3.match.value返回數據是一個list，我們要獲取特定的值

data = {'foo': [{'baz': 'news'}, {'baz': 'music'}]}
print([match.value for match in jsonpath_expr.find(data)][0])

運行結果：
news