Check keys into dict

find_key_dict_python.py

class TarefasFlat():
    def __init__(self, data):
        if data is not None:
            self.dados = self.convert_to_flat_object(data)

    def convert_to_flat_object(self, data):
        ativo_flat_list = []
        for tarefa in data:
            ativo_flat_list.append(self.reduce_tarefa_fields(tarefa))
        return ativo_flat_list

    def reduce_tarefa_fields(self, tarefa):
        return {
            "id": tarefa["id"] if self.keys_exists(tarefa, "id") else None,
            "caso": {
                "pasta": tarefa["caso"]["pasta"] if self.keys_exists(tarefa, "caso", "pasta") else None,
                "carteira": {
                    "nome": tarefa["caso"]["carteira"]["nome"] if self.keys_exists(tarefa, "caso", "carteira",
                                                                                   "nome") else None
                }
            }
        }

    def keys_exists(self, element, *keys):
        _element = element
        for key in keys:
            try:
                if _element is None:
                    return False
                _element = _element[key]
            except KeyError:
                return False
        return True