json的xpath：简易数据查询

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class JsonQuery(object):     def __init__(self, data):         super(JsonQuery, self).__init__()         self.data = data       def get(self, path, default=None):         if self.data is None or path == '':             return self.data         query_keys = path.split("/")         key = query_keys[0]         left_path = '/'.join(query_keys[1:])         if isinstance(self.data, list):             return [JsonQuery(v).get(path, default) if v else None for v in self.data]         else:             return JsonQuery(dict.get(self.data, key, default)).get(left_path, default)

 

运行效果：

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d = {"main":[{"x":[{"x1":1,"x2":2},{"x1":11,"x2": 12}],"y":2},{"x":[{"x1":3,"x2":4}],"y":4}]} >>> info = JsonQuery(d) >>> info.get('main') [{'y': 2, 'x': [{'x2': 2, 'x1': 1}, {'x2': 12, 'x1': 11}]}, {'y': 4, 'x': [{'x2': 4, 'x1': 3}]}] >>> info.get('main/x') [[{'x2': 2, 'x1': 1}, {'x2': 12, 'x1': 11}], [{'x2': 4, 'x1': 3}]] >>> info.get('main/x/x1') [[1, 11], [3]]