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我有一条路。使用 dpath-utils，我通过根据路径长度创建子键来创建字典。但在当前示例中，我的路径长度很短，如下所示。

注意： 如果路径很长：“/cbghb6b2861f919f6ffc238a0c5cffed63436/bbc238a0c5cffed6343fc238a0c5cffed63436”。我解释了这一点，因为这就是我使用 dpath.utils 的原因

我使用 dpath.utils 将路径添加到字典的相应键，如下所示。

model_dict = {}
path = "/b6b2861f919f6fc238a0c5cffed63436"
data= {
        'metadata': {
                          'author': None, 
                          'column_name': [...], 
                          'date': datetime.datetime(20...1, 870998), 
         'metrics': {...}, 
         'name': None, 'source_code_version': None}, 
         'model': <src.python.ml.optis...10f4695f8>
        }
 }


dpath.util.set(model_dict, path, data)

model_dict = {
             'b6b2861f919f6fc238a0c5cffed63436':{
                    'metadata': {
                          'author': None, 
                          'column_name': [...], 
                          'date': datetime.datetime(20...1, 870998), 
                    'metrics': {...}, 
                    'name': None, 'source_code_version': None}, 
                    'model': <src.python.ml.optis...10f4695f8>
                   }
             }

dpath.util.get(model_dict, path)

但是使用路径调用时出现此错误。

输出：

 File "/Users/****/Documents/**/src/python/ws/***/restful/**/**.py", line 30, in get_model
    return dpath.util.get(self.persisted_file , path)
 File "/Users/*****/.virtualenvs/*****/lib/python3.7/site-packages/dpath/util.py", line 171, in get
    results = dpath.segments.fold(obj, f, [])
  File "/Users/****/.virtualenvs/******/lib/python3.7/site-packages/dpath/segments.py", line 349, in fold
    for pair in walk(obj):
  File "/Users/******/.virtualenvs/*******/lib/python3.7/site-packages/dpath/segments.py", line 62, in walk
    for found in walk(v, location + (k,)):
  File "/Users/*****/.virtualenvs/*******/lib/python3.7/site-packages/dpath/segments.py", line 62, in walk
    for found in walk(v, location + (k,)):
  File "/Users/******/.virtualenvs/********/lib/python3.7/site-packages/dpath/segments.py", line 48, in walk
    for k, v in kvs(obj):
  File "/Users/*****/.virtualenvs/****/lib/python3.7/site-packages/dpath/segments.py", line 16, in kvs
    return zip(range(len(node)), node)
TypeError: object of type 'RegressionModel' has no len()

但是当我直接打电话时，没有问题，但我不想直接打电话。因为我可能想在其子键之一中获取值。以及这有多低。

model_dict.get("b6b2861f919f6fc238a0c5cffed63436")

输出：

{
        'metadata': {
                          'author': None, 
                          'column_name': [...], 
                          'date': datetime.datetime(20...1, 870998), 
         'metrics': {...}, 
         'name': None, 'source_code_version': None}, 
         'model': <src.python.ml.optis...10f4695f8>
        }
 }
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