src/open-r1-multimodal/src/open_r1/grpo_rec.py [135:186]:
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        super(LazySupervisedDataset, self).__init__()
        self.script_args = script_args
        self.list_data_dict = []

        if data_path.endswith(".yaml"):
            with open(data_path, "r") as file:
                yaml_data = yaml.safe_load(file)
                datasets = yaml_data.get("datasets")
                # file should be in the format of:
                # datasets:
                #   - json_path: xxxx1.json
                #     sampling_strategy: first:1000
                #   - json_path: xxxx2.json
                #     sampling_strategy: end:3000
                #   - json_path: xxxx3.json
                #     sampling_strategy: random:999

                for data in datasets:
                    json_path = data.get("json_path")
                    sampling_strategy = data.get("sampling_strategy", "all")
                    sampling_number = None

                    if json_path.endswith(".jsonl"):
                        cur_data_dict = []
                        with open(json_path, "r") as json_file:
                            for line in json_file:
                                cur_data_dict.append(json.loads(line.strip()))
                    elif json_path.endswith(".json"):
                        with open(json_path, "r") as json_file:
                            cur_data_dict = json.load(json_file)
                    else:
                        raise ValueError(f"Unsupported file type: {json_path}")

                    if ":" in sampling_strategy:
                        sampling_strategy, sampling_number = sampling_strategy.split(":")
                        if "%" in sampling_number:
                            sampling_number = math.ceil(int(sampling_number.split("%")[0]) * len(cur_data_dict) / 100)
                        else:
                            sampling_number = int(sampling_number)

                    # Apply the sampling strategy
                    if sampling_strategy == "first" and sampling_number is not None:
                        cur_data_dict = cur_data_dict[:sampling_number]
                    elif sampling_strategy == "end" and sampling_number is not None:
                        cur_data_dict = cur_data_dict[-sampling_number:]
                    elif sampling_strategy == "random" and sampling_number is not None:
                        random.shuffle(cur_data_dict)
                        cur_data_dict = cur_data_dict[:sampling_number]
                    print(f"Loaded {len(cur_data_dict)} samples from {json_path}")
                    self.list_data_dict.extend(cur_data_dict)
        else:
            raise ValueError(f"Unsupported file type: {data_path}")
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src/open-r1-multimodal/src/open_r1/sft.py [80:131]:
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        super(LazySupervisedDataset, self).__init__()
        self.script_args = script_args
        self.list_data_dict = []

        if data_path.endswith(".yaml"):
            with open(data_path, "r") as file:
                yaml_data = yaml.safe_load(file)
                datasets = yaml_data.get("datasets")
                # file should be in the format of:
                # datasets:
                #   - json_path: xxxx1.json
                #     sampling_strategy: first:1000
                #   - json_path: xxxx2.json
                #     sampling_strategy: end:3000
                #   - json_path: xxxx3.json
                #     sampling_strategy: random:999

                for data in datasets:
                    json_path = data.get("json_path")
                    sampling_strategy = data.get("sampling_strategy", "all")
                    sampling_number = None

                    if json_path.endswith(".jsonl"):
                        cur_data_dict = []
                        with open(json_path, "r") as json_file:
                            for line in json_file:
                                cur_data_dict.append(json.loads(line.strip()))
                    elif json_path.endswith(".json"):
                        with open(json_path, "r") as json_file:
                            cur_data_dict = json.load(json_file)
                    else:
                        raise ValueError(f"Unsupported file type: {json_path}")

                    if ":" in sampling_strategy:
                        sampling_strategy, sampling_number = sampling_strategy.split(":")
                        if "%" in sampling_number:
                            sampling_number = math.ceil(int(sampling_number.split("%")[0]) * len(cur_data_dict) / 100)
                        else:
                            sampling_number = int(sampling_number)

                    # Apply the sampling strategy
                    if sampling_strategy == "first" and sampling_number is not None:
                        cur_data_dict = cur_data_dict[:sampling_number]
                    elif sampling_strategy == "end" and sampling_number is not None:
                        cur_data_dict = cur_data_dict[-sampling_number:]
                    elif sampling_strategy == "random" and sampling_number is not None:
                        random.shuffle(cur_data_dict)
                        cur_data_dict = cur_data_dict[:sampling_number]
                    print(f"Loaded {len(cur_data_dict)} samples from {json_path}")
                    self.list_data_dict.extend(cur_data_dict)
        else:
            raise ValueError(f"Unsupported file type: {data_path}")
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