def merge_dicts()

in ecs_logging/_utils.py [0:0]

• 15 lines of code
• 5 McCabe index (conditional complexity)

def merge_dicts(from_: Dict[Any, Any], into: Dict[Any, Any]) -> Dict[Any, Any]:
    """Merge deeply nested dictionary structures.
    When called has side-effects within 'destination'.
    """
    for key, value in from_.items():
        into.setdefault(key, {})
        if isinstance(value, dict) and isinstance(into[key], dict):
            merge_dicts(value, into[key])
        elif into[key] != {}:
            raise TypeError(
                "Type mismatch at key `{}`: merging dicts would replace value `{}` with `{}`. This is likely due to "
                "dotted keys in the event dict being turned into nested dictionaries, causing a conflict.".format(
                    key, into[key], value
                )
            )
        else:
            into[key] = value
    return into