如何将字典从JSON文件提取到pandas Dataframe？

Question

I've extracted the data into a JSON file (it is a nest filed)

I've read_json to extract the data into a pandas:

df = pd.read_json('./data0000.json')

but got this as the data is nested ( all the fields are under Data):

                             Data
0   {field 1, field 2, field 3....)      

How do I unnest it in a panda dataframe?

Answer 1

For the following data format, read_json() works as you would like:

    [
    {"firstName":"John", "lastName":"Doe"},
    {"firstName":"Anna", "lastName":"Smith"},
    {"firstName":"Peter", "lastName":"Jones"}
    ]

We would still need to see your data for a full fix, but you may also want to explore the "orient" parameter in read_json().

    data = pd.read_json('data0000.json',orient='records')

Allowed values for orient are: {'split','records','index','columns','values'}

From the docs link :

• DataFrame

  • default is 'columns'
  • allowed values are: {'split','records','index','columns','values'}
  • The DataFrame index must be unique for orients 'index' and 'columns'.
  • The DataFrame columns must be unique for orients 'index', 'columns', and 'records'.