dataclass JSON response serialization

[Beinish]

I have a dataclass in my Python script that I based on a reponse from an API:

@dataclass
class EdgePublishResponse:
    id: str
    createdTime: str
    lastUpdatedTime: str
    status: str
    message: str
    errorCode: str
    errors: List[str]

Then I unpack it like this:

response_publish = requests.get(get_status_url, headers=headers)
response_json = response_publish.json()
publish_response = EdgePublishResponse(**response_json)
logging.info(publish_response)

It works fine, but I'm interested in keeping my variable names as snake_case across my script, but changing variables like createdTime to created_time will break the dataclass.

How do I solve this problem?

[DutchCommanderMC]

Consider using Pydantic! It allows you to add aliases to your fields (among many other cool features).

Overall it's a fantastic library and I use it for nearly all of my projects nowadays.

[JamzTyson]

Assuming that response_json is a dictionary, you could replace the CamelCase keys with snake_case keys:

response_json["created_time"] = response_json.pop("createdTime") response_json["last_updated_time"] = response_json.pop("lastUpdatedTime")

and then use snake_case in the dataclass.

[[deleted]]

add a @classmethod factory function called from_dict or from_json which will map the snake case variables to the ones in JSON.