How to get a clean result out of DynamoDB? - python-3.x

Question

I'm using DynamoDB and when I use the funcion boto3.get_item() it returns me a dict like that:
{'last_updated': {'S': '2020-02-11 21:48:05'},
'id_': {'S': 'ID_DA_SURVEY'},
'deleted': {'BOOL': False},
'created': {'S': '2020-02-11 21:48:05'},
'activated': {'BOOL': False},
'step': {'S': 'editor'},
'owner': {'N': '12'},
'built': {'BOOL': False},
'name': {'S': 'Survey UM'},
'up_lime': {'BOOL': False},
'lang': {'S': 'pt'},
'teste': {'M': {'test': {'M': {'test2': {'N': '54'}}}}}
}
There is a way so I can get my Dict like that:
{'last_updated': '2020-02-11 21:48:05',
'id_': 'ID_DA_SURVEY',
'deleted': False,
'created': '2020-02-11 21:48:05',
'activated': False,
'step': 'editor',
'owner': '12',
'built': False,
'name': 'Survey UM',
'up_lime': False,
'lang': 'pt',
'teste': {'test': {'test2': '54'}}
}
I Just need to get rid of the Attribut Type. Can anyone help me?

Answer 1

You can use boto3 class named TypeDeserializer from the dynamodb types package.
Here's an example:
import pprint
from boto3.dynamodb.types import TypeDeserializer
item = {
'last_updated': {
'S': '2020-02-11 21:48:05'
},
'id_': {
'S': 'ID_DA_SURVEY'
},
'deleted': {
'BOOL': False
},
'created': {
'S': '2020-02-11 21:48:05'
},
'activated': {
'BOOL': False
},
'step': {
'S': 'editor'
},
'owner': {
'N': '12'
},
'built': {
'BOOL': False
},
'name': {
'S': 'Survey UM'
},
'up_lime': {
'BOOL': False
},
'lang': {
'S': 'pt'
},
'teste': {
'M': {
'test': {
'M': {
'test2': {
'N': '54'
}
}
}
}
}
}
type_deserializer = TypeDeserializer()
py_data = {k: type_deserializer.deserialize(v) for k,v in item.items()}
pprint.pprint(py_data)
The output is:
{'activated': False,
'built': False,
'created': '2020-02-11 21:48:05',
'deleted': False,
'id_': 'ID_DA_SURVEY',
'lang': 'pt',
'last_updated': '2020-02-11 21:48:05',
'name': 'Survey UM',
'owner': Decimal('12'),
'step': 'editor',
'teste': {'test': {'test2': Decimal('54')}},
'up_lime': False}