.dockerignore

-models/**
\ No newline at end of file
+.git/
+models/**
+data/
\ No newline at end of file

Dockerfile

-FROM nvidia/cuda:11.8.0-cudnn8-runtime-ubuntu20.04
+FROM nvidia/cuda:12.1.1-cudnn8-devel-ubuntu20.04
 
 ENV DEBIAN_FRONTEND=noninteractive \
     LANG=en_US.UTF-8 \
@@ -12,7 +12,7 @@ ENV DEBIAN_FRONTEND=noninteractive \
 
 # Install system dependencies and clean up in one layer
 COPY apt.txt /tmp/apt.txt
-RUN apt -qq update && apt -qq install -y --no-install-recommends `cat /tmp/apt.txt` locales wget \
+RUN apt -qq update && apt -qq install -y --no-install-recommends `cat /tmp/apt.txt | tr -d '\r'` locales wget build-essential \
     && locale-gen en_US.UTF-8 \
     && rm -rf /var/cache/apt/* /var/lib/apt/lists/* \
     && apt clean

README.md

-![AMAZON KDD CUP 2024: MULTI-TASK ONLINE SHOPPING CHALLENGE FOR LLMS](https://images.aicrowd.com/raw_images/challenges/social_media_image_file/1139/566667103918dae81381.jpg)
+![AMAZON KDD CUP 2024: MULTI-TASK ONLINE SHOPPING CHALLENGE FOR LLMS](https://aicrowd-production.s3.eu-central-1.amazonaws.com/challenge_images/amazon-kdd-cup-2024/amazon-kdd-cup-24-banner.jpg)
 [![Discord](https://img.shields.io/discord/565639094860775436.svg)](https://discord.gg/yWurtB2huX)
 
 # 🛒 [Amazon KDD CUP 2024: Multi-Task Online Shopping Challenge for LLMs](https://www.aicrowd.com/challenges/amazon-kdd-cup-2024-multi-task-online-shopping-challenge-for-llms) Starter Kit
@@ -55,7 +55,9 @@ The development datasets will be given in json format with the following fields.
 - `input_field`: This field contains the instructions and the question that should be answered by the model. 
 - `output_field`: This field contains the ground truth answer to the question. 
 - `task_type`: This field contains the type of the task (Details in the next Section, "Tasks")
+- `task_name`: This field contains the name of the task. However, the exact task names are redacted, and we only provide participants with hashed task names (e.g. `task1`, `task2`). 
 - `metric`: This field contains the metric used to evaluate the question (Details in Section "Evaluation Metrics"). 
+- `track`: This field specifies the track the question comes from. 
 
 However, the test dataset (which will be hidden from participants) will have a different format with only two fields: 
 - `input_field`, which is the same as above. 
@@ -116,7 +118,7 @@ Please follow the instructions in [models/README.md](models/README.md) for instr
 
 1. **Add your SSH key** to AIcrowd GitLab
 
-You can add your SSH Keys to your GitLab account by going to your profile settings [here](https://gitlab.aicrowd.com/profile/keys). If you do not have SSH Keys, you will first need to [generate one](https://docs.gitlab.com/ee/user/ssh.html).
+You can add your SSH Keys to your GitLab account by going to your profile settings [here](https://gitlab.aicrowd.com/-/profile/keys). If you do not have SSH Keys, you will first need to [generate one](https://docs.gitlab.com/ee/user/ssh.html).
 
 2. **Fork the repository**. You can use [this link](https://gitlab.aicrowd.com/aicrowd/challenges/amazon-kdd-cup-2024/amazon-kdd-cup-2024-starter-kit/-/forks/new) to create a fork.
 
@@ -153,8 +155,22 @@ This also includes instructions on [specifying your software runtime](docs/submi
 
 ## 💻 What hardware does my code run on ?
 You can find more details about the hardware and system configuration in [docs/hardware-and-system-config.md](docs/hardware-and-system-config.md).
-In summary, we provide you `2` x [[NVIDIA T4 GPUs](https://www.nvidia.com/en-us/data-center/tesla-t4/)] in Phase 1; and `4` x [[NVIDIA T4 GPUs](https://www.nvidia.com/en-us/data-center/tesla-t4/)] in Phase 2.
+In summary, we provide you `4` x [[NVIDIA T4 GPUs](https://www.nvidia.com/en-us/data-center/tesla-t4/)] in Phase 2.
 
+Your solution will be given a certain amount of time for inference, after which it would be immediately killed and no results would be available. The time limit is set at 
+| Phase  | Track 1 | Track 2 | Track 3 | Track 4 | Track 5 |
+| ------ | ------- | ------- | ------- | ------- | ------- |
+| **Phase 2**| 70 minutes | 20 minutes | 30 minutes | 20 minutes | 140 minutes |
+
+For reference, the baseline solution with zero-shot LLaMA3-8B-instruct consumes the following amount of time. 
+
+| Phase  | Track 1 | Track 2 | Track 3 | Track 4 | 
+| ------ | ------- | ------- | ------- | ------- | 
+| **Phase 2**| 1490s | 397s | 576s | 359s | 
+
+We limit the prediction time of each sample to at most **10 seconds**. This limit applies at a batch level. For example, for a batch of 8 samples, you should return the prediction after at most 80 seconds. Otherwise, your submission will be killed. 
+
+Your maximum repo size is 200GB. 
 
 ## 🧩 How are my model responses parsed by the evaluators ?
 Please refer to [parsers.py](parsers.py) for more details on how we parse your model responses.

docker_run.sh

@@ -35,6 +35,7 @@ docker run \
     --gpus all \
     -v "$(pwd)":/submission \
     -w /submission \
+    --shm-size=10.24gb\
     $IMAGE_NAME python local_evaluation.py
 
 # Note: We assume you have nvidia-container-toolkit installed and configured 

docs/download-baseline-model-weights.md

+### Setting Up and Downloading Baseline Model weighta with Hugging Face
+
+This guide outlines the steps to download (and check in) the models weights required for the baseline models.
+We will focus on the `Meta-Llama-3-8B-Instruct`.
+But the steps should work equally well for any other models on hugging face. 
+
+#### Preliminary Steps:
+
+1. **Install the Hugging Face Hub Package**:
+   
+   Begin by installing the `huggingface_hub` package, which includes the `hf_transfer` utility, by running the following command in your terminal:
+
+   ```bash
+   pip install huggingface_hub[hf_transfer]
+   ```
+
+2. **Accept the LLaMA Terms**:
+   
+   You must accept the LLaMA model's terms of use by visiting: [meta-llama/Meta-Llama-3-8B-Instruct Terms](https://huggingface.co/meta-llama/Meta-Llama-3-8B-Instruct).
+
+3. **Create a Hugging Face CLI Token**:
+   
+   Generate a CLI token by navigating to: [Hugging Face Token Settings](https://huggingface.co/settings/tokens). You will need this token for authentication.
+
+#### Hugging Face Authentication:
+
+1. **Login via CLI**:
+   
+   Authenticate yourself with the Hugging Face CLI using the token created in the previous step. Run:
+
+   ```bash
+   huggingface-cli login
+   ```
+
+   When prompted, enter the token.
+
+#### Model Downloads:
+
+1. **Download LLaMA-2-7b Model**:
+
+   Execute the following command to download the `Meta-Llama-3-8B-Instruct` model to a local subdirectory. This command excludes unnecessary files to save space:
+
+   ```bash
+   HF_HUB_ENABLE_HF_TRANSFER=1 huggingface-cli download \
+       meta-llama/Meta-Llama-3-8B-Instruct \
+       --local-dir-use-symlinks False \
+       --local-dir models/meta-llama/Meta-Llama-3-8B-Instruct \
+       --exclude *.pth # These are alternates to the safetensors hence not needed
+   ```
+
+#### Version Control with Git LFS:
+
+1. **Track Model Weights**:
+   
+   Use Git Large File Storage (LFS) to track the model directories. This ensures efficient handling of large files:
+
+   ```bash
+   git lfs track "models/meta-llama/*"
+   ```
+
+2. **Commit and Push**:
+   
+   Add the models to your Git repository, commit the changes, and push them to your remote repository:
+
+   ```bash
+   git add models/
+   git commit -am "add weights"
+   git push origin master
+   ```
+If you are struggling with GIT-LFS, you are very much encouraged to check out [this post](https://discourse.aicrowd.com/t/how-to-upload-large-files-size-to-your-submission/2304).

docs/hardware-and-system-config.md

@@ -11,18 +11,19 @@ We apply a limit on the hardware available to each participant to run their solu
     - `40` x vCPU (`20` physical CPU cores)
     - `180GB` RAM 
 
+**Note**: When running in `gpu:false` mode, you will have access to `4` x vCPUs (`2` physical cores) and `8GB` RAM. 
 
 Please note that NVIDIA T4 uses a somewhat outdated architectures and is thus not compatible with certain acceleration toolkits (e.g. Flash Attention), so please be careful about compatibility.
 
 Besides, the following restrictions will also be imposed: 
 
-- Network connection will be disabled (except for HuggingFace to download open-source checkpoints). 
-- Each submission will be assigned a certain amount of time to run. Submissions that exceed the time limits will be killed and will not be evaluated. The tentative time limit is set as follows **[TO BE TESTED WITH AICROWD SUBMISSION SYSTEM]**. 
+- Network connection will be disabled. 
+- Each submission will be assigned a certain amount of time to run. Submissions that exceed the time limits will be killed and will not be evaluated. The tentative time limit is set as follows. 
 
 | Phase  | Track 1 | Track 2 | Track 3 | Track 4 | Track 5 |
 | ------ | ------- | ------- | ------- | ------- | ------- |
 | **Phase 1**| 140 minutes | 40 minutes | 60 minutes | 60 minutes | 5 hours |
 
-- Each team will be able to make up to **4 submissions per week**, with a maximum of **2 Track 5 all-around submissions** **[TO BE TESTED WITH AICROWD SUBMISSION SYSTEM]**. 
+- Each team will be able to make up to **2 submissions per week** per track for Tracks 1-4, and **1 submission per week** for track 5 all-around. 
 
 Based on the hardware and system configuration, we recommend participants to begin with 7B models. According to our experiments, 7B models like Vicuna-7B and Mistral can perform inference smoothly on 2 NVIDIA T4 GPUs, while 13B models will result in OOM. 

docs/runtime.md

@@ -17,11 +17,13 @@ Few of the most common ways are as follows:
     [...]
     ```
 
+We would suggest participants to keep the `requirements.txt` to the minimum, with only necessary packages in it. Chances are that, the more (unnecessary) packages you put in it, the more likely you may encounter an error on some (maybe totally unnecessary) packages. 
+
 * `apt.txt` -- The Debian packages (via aptitude) used by your inference code!
 
 These files are used to construct your **AIcrowd submission docker containers** in which your code will run.
 
-* `Dockerfile` -- **For advanced users only**. `Dockerfile` gives you more flexibility on defining the software runtime used during evaluations.
+* `Dockerfile` -- `Dockerfile` gives you more flexibility on defining the software runtime used during evaluations. The `Dockerfile` under the root path of the starter kit will be used to build your solution. Feel free to modify anything in it, and test it locally. 
 
 ----
 

local_evaluation.py

@@ -52,20 +52,36 @@ def generate_model_outputs(data_df, model):
     - A list containing the model outputs for each entry in the data DataFrame.
     """
     outputs = []
-    for _, row in tqdm(
-        data_df.iterrows(), total=len(data_df), desc="Generating Responses"
-    ):
-        is_multiple_choice = row["task_type"] == "multiple-choice"
-        # the 'task_type' column won't be available during evaluation, so you should use something like
-        # ```is_multiple_choice = row['is_multiple_choice']``
-        prompt = row["input_field"]
-        model_output = model.predict(prompt, is_multiple_choice)
-        outputs.append(model_output)
-    return outputs
+    task_grouped_df = data_df.groupby(by=["task_type"])
+    
+    for task_type, task_group_data_df in task_grouped_df:
+        task_group_data_df = task_group_data_df.reset_index(drop=True)
+        
+        is_multiple_choice = task_type[0] == "multiple-choice"
+        batch_size = model.get_batch_size()
+        
+        batches = [task_group_data_df[i:i+batch_size] for i in range(0,len(task_group_data_df),batch_size)]
+        
+        for batch_df in batches:
+            batch = {
+                "prompt": batch_df["input_field"].tolist(),
+            }
+            model_output = model.batch_predict(
+                    batch, 
+                    is_multiple_choice
+                )
+            outputs.append(
+                pd.DataFrame({
+                    "input_field": batch["prompt"],
+                    "model_output_str": model_output
+                }))
+    
+    df_outputs = pd.concat(outputs)
+    return df_outputs
 
 
 # Function to evaluate the generated model outputs
-def evaluate_outputs(data_df, outputs, log_every_n_steps=1):
+def evaluate_outputs(data_df, log_every_n_steps=1):
     """
     Evaluate the model outputs against ground truth values using specified metrics.
 
@@ -84,17 +100,18 @@ def evaluate_outputs(data_df, outputs, log_every_n_steps=1):
     for row_idx, row in tqdm(
         data_df.iterrows(), total=len(data_df), desc="Evaluating"
     ):
-        task_name, task_type, metric, ground_truth = (
+        task_name, task_type, metric, ground_truth, model_output_str = (
             row["task_name"],
             row["task_type"],
             row["metric"],
             row["output_field"],
+            row["model_output_str"],
         )
 
         if metric not in eval_methods:
             raise NotImplementedError(f"No metric for {metric=}")
 
-        model_output = task_parsers[task_type].parse(outputs[row_idx])
+        model_output = task_parsers[task_type].parse(model_output_str)
         eval_fn = eval_methods[metric]
         metric_score = eval_fn(model_output, ground_truth)
 
@@ -230,14 +247,15 @@ def main():
     model = UserModel()
 
     # Generate model outputs
-    outputs = generate_model_outputs(data_df, model)
-    data_df["outputs"] = (
-        outputs  # Optional: Add outputs back to DataFrame for inspection
-    )
-    print(data_df.head())
+    df_outputs = generate_model_outputs(data_df, model)
+    
+    # add outputs to the data_df
+    merged_data_df = pd.merge(data_df, df_outputs, on="input_field")
+        
+    print(merged_data_df.head())
 
     # Evaluate the generated outputs and calculate metrics
-    per_task_metrics = evaluate_outputs(data_df, outputs)
+    per_task_metrics = evaluate_outputs(merged_data_df)
 
     # Aggregate and display the evaluation scores
     overall_metrics = aggregate_scores(per_task_metrics)

metrics.py

-from rouge_score import rouge_scorer
-from sentence_transformers import SentenceTransformer
-import numpy as np
-import evaluate
+import os
+from typing import List, Tuple, Union
 
+import evaluate
+import numpy as np
 import torch
-
-from typing import List, Union, Tuple
+from loguru import logger
+from rouge_score import rouge_scorer
+from sentence_transformers import SentenceTransformer
 
 sacrebleu = None
 sentence_transformer_model_cache = {}

models/README.md

@@ -4,7 +4,7 @@
 For a streamlined experience, we suggest placing the code for all your models within the `models` directory. This is a recommendation for organizational purposes, but it's not a strict requirement.
 
 ## Model Base Class
-Your models should inherit from the `ShopBenchBaseModel` class found in [base_model.py](base_model.py). We provide an example model, `dummy_model.py`, to illustrate how you might structure your own model. Crucially, your model class must implement the `predict` method.
+Your models should inherit from the `ShopBenchBaseModel` class found in [base_model.py](base_model.py). We provide an example model, `dummy_model.py`, to illustrate how you might structure your own model. Crucially, your model class must implement the `batch_predict` method.
 
 ## Configuring Your Model
 To ensure your model is recognized and utilized correctly, please specify your model class name in the [`user_config.py`](user_config.py) file, by following the instructions in the inline comments.
@@ -12,12 +12,14 @@ To ensure your model is recognized and utilized correctly, please specify your m
 ## Model Inputs and Outputs
 
 ### Inputs
-Your model will receive two pieces of information for every task:
-- `prompt` (`str`): This is the specific task's input prompt.
+- `batch` (`Dict[str, Any]`): A batch of inputs as a dictionary, where the dictionary has the following key:
+    - `prompt` (`List[str]`): `A list if prompts representing the tasks in a batch`
 - `is_multiple_choice` (`bool`): This indicates whether the task is a multiple choice question.
 
 ### Outputs
-The output from your model's `predict` function should always be a string. Depending on the task, this could be:
+
+The output from your model's `batch_predict` function should be a list of string responses for all the prompts in the input batch.
+Depending on the task, each response could be:
 - A single integer (in the range [0, 3]) for multiple choice tasks.
 - A comma-separated list of integers for ranking tasks.
 - A comma-separated list of named entities for Named Entity Recognition (NER) tasks.

models/base_model.py

+from typing import Any, Dict, List
+
+
 class ShopBenchBaseModel:
     def __init__(self):
         pass
 
-    def predict(self, prompt: str, is_multiple_choice: bool) -> str:
+    def get_batch_size(self) -> int:
+        """
+        Determines the batch size that is used by the evaluator when calling the `batch_predict` function.
+
+        Returns:
+            int: The batch size, an integer between 1 and 16. This value indicates how many
+                 queries should be processed together in a single batch. It can be dynamic
+                 across different batch_predict calls, or stay a static value.
+        """
+        raise NotImplementedError("get_batch_size method not implemented")
+
+    def batch_predict(self, batch: Dict[str, Any], is_multiple_choice:bool) -> List[str]:
         """
-        Generates a prediction based on the input prompt and task type.
+        Generates a batch of prediction based on associated prompts and task_type
 
         For multiple choice tasks, it randomly selects a choice.
         For other tasks, it returns a list of integers as a string,
         representing the model's prediction in a format compatible with task-specific parsers.
 
-        Args:
-            prompt (str): The input prompt for the model.
-            is_multiple_choice (bool): Indicates whether the task is a multiple choice question.
+        Parameters:
+            - batch (Dict[str, Any]): A dictionary containing a batch of input prompts with the following keys
+                - prompt (List[str]): a list of input prompts for the model.
+    
+            - is_multiple_choice bool: A boolean flag indicating if all the items in this batch belong to multiple choice tasks.
 
         Returns:
-            str: The prediction as a string representing a single integer[0, 3] for multiple choice tasks,
+            str: A list of predictions for each of the prompts received in the batch.
+                    Each prediction is
+                           a string representing a single integer[0, 3] for multiple choice tasks,
                         or a string representing a comma separated list of integers for Ranking, Retrieval tasks,
                         or a string representing a comma separated list of named entities for Named Entity Recognition tasks.
                         or a string representing the (unconstrained) generated response for the generation tasks

models/dummy_model.py

-from typing import List, Union
-import random
 import os
+import random
+from typing import Any, Dict, List
 
 from .base_model import ShopBenchBaseModel
 
@@ -19,34 +19,55 @@ class DummyModel(ShopBenchBaseModel):
         """Initializes the model and sets the random seed for consistency."""
         random.seed(AICROWD_RUN_SEED)
 
-    def predict(self, prompt: str, is_multiple_choice: bool) -> str:
+    def get_batch_size(self) -> int:
+        """
+        Determines the batch size that is used by the evaluator when calling the `batch_predict` function.
+
+        Returns:
+            int: The batch size, an integer between 1 and 16. This value indicates how many
+                 queries should be processed together in a single batch. It can be dynamic
+                 across different batch_predict calls, or stay a static value.
+        """
+        self.batch_size = 4
+        return self.batch_size
+
+    def batch_predict(self, batch: Dict[str, Any], is_multiple_choice:bool) -> List[str]:
         """
-        Generates a prediction based on the input prompt and task type.
+        Generates a batch of prediction based on associated prompts and task_type
 
         For multiple choice tasks, it randomly selects a choice.
         For other tasks, it returns a list of integers as a string,
         representing the model's prediction in a format compatible with task-specific parsers.
 
-        Args:
-            prompt (str): The input prompt for the model.
-            is_multiple_choice (bool): Indicates whether the task is a multiple choice question.
+        Parameters:
+            - batch (Dict[str, Any]): A dictionary containing a batch of input prompts with the following keys
+                - prompt (List[str]): a list of input prompts for the model.
+    
+            - is_multiple_choice bool: A boolean flag indicating if all the items in this batch belong to multiple choice tasks.
 
         Returns:
-            str: The prediction as a string representing a single integer[0, 3] for multiple choice tasks,
+            str: A list of predictions for each of the prompts received in the batch.
+                    Each prediction is
+                           a string representing a single integer[0, 3] for multiple choice tasks,
                         or a string representing a comma separated list of integers for Ranking, Retrieval tasks,
                         or a string representing a comma separated list of named entities for Named Entity Recognition tasks.
                         or a string representing the (unconstrained) generated response for the generation tasks
                         Please refer to parsers.py for more details on how these responses will be parsed by the evaluator.
         """
+        prompts = batch["prompt"]
+
         possible_responses = [1, 2, 3, 4]
 
-        if is_multiple_choice:
-            # Randomly select one of the possible responses for multiple choice tasks
-            return str(random.choice(possible_responses))
-        else:
-            # For other tasks, shuffle the possible responses and return as a string
-            random.shuffle(possible_responses)
-            return str(possible_responses)
-            # Note: As this is dummy model, we are returning random responses for non-multiple choice tasks.
-            # For generation tasks, this should ideally return an unconstrained string.
+        batch_response = []
+        for prompt in prompts:
+            if is_multiple_choice:
+                # Randomly select one of the possible responses for multiple choice tasks
+                batch_response.append(str(random.choice(possible_responses)))
+            else:
+                # For other tasks, shuffle the possible responses and return as a string
+                random.shuffle(possible_responses)
+                batch_response.append(str(possible_responses))
+                # Note: As this is dummy model, we are returning random responses for non-multiple choice tasks.
+                # For generation tasks, this should ideally return an unconstrained string.
 
+        return batch_response

models/user_config.py

@@ -19,3 +19,10 @@ UserModel = DummyModel
 #
 # UserModel = YourModel
 
+
+# For example, to use the Llama3 8B Instruct baseline, you can comment the lines below:
+# please remember to download the model weights and checking them into the repository 
+# before submitting
+
+# from models.vanilla_llama3_baseline import Llama3_8B_ZeroShotModel
+# UserModel = Llama3_8B_ZeroShotModel

models/vanilla_llama3_baseline.py

+import os
+import random
+from typing import Any, Dict, List
+
+import vllm
+
+from .base_model import ShopBenchBaseModel
+
+#### CONFIG PARAMETERS ---
+
+# Set a consistent seed for reproducibility
+AICROWD_RUN_SEED = int(os.getenv("AICROWD_RUN_SEED", 773815))
+
+# Batch size you wish the evaluators will use to call the `batch_generate_answer` function
+AICROWD_SUBMISSION_BATCH_SIZE = 16 # TUNE THIS VARIABLE depending on the number of GPUs you are requesting and the size of your model.
+
+# VLLM Parameters 
+VLLM_TENSOR_PARALLEL_SIZE = 4 # TUNE THIS VARIABLE depending on the number of GPUs you are requesting and the size of your model.
+VLLM_GPU_MEMORY_UTILIZATION = 0.85 # TUNE THIS VARIABLE depending on the number of GPUs you are requesting and the size of your model.
+
+
+class Llama3_8B_ZeroShotModel(ShopBenchBaseModel):
+    """
+    A dummy model implementation for ShopBench, illustrating how to handle both
+    multiple choice and other types of tasks like Ranking, Retrieval, and Named Entity Recognition.
+    This model uses a consistent random seed for reproducible results.
+    """
+
+    def __init__(self):
+        """Initializes the model and sets the random seed for consistency."""
+        random.seed(AICROWD_RUN_SEED)
+        self.initialize_models()
+
+    def initialize_models(self):
+        # Initialize Meta Llama 3 - 8B Instruct Model
+        self.model_name = "models/meta-llama/Meta-Llama-3-8B-Instruct"
+
+        if not os.path.exists(self.model_name):
+            raise Exception(
+                f"""
+            The evaluators expect the model weights to be checked into the repository,
+            but we could not find the model weights at {self.model_name}
+            
+            Please follow the instructions in the docs below to download and check in the model weights.
+                https://gitlab.aicrowd.com/aicrowd/challenges/amazon-kdd-cup-2024/amazon-kdd-cup-2024-starter-kit/-/blob/master/docs/download-baseline-model-weights.md
+            
+            """
+            )
+
+        # initialize the model with vllm
+        self.llm = vllm.LLM(
+            self.model_name,
+            worker_use_ray=True,
+            tensor_parallel_size=VLLM_TENSOR_PARALLEL_SIZE, 
+            gpu_memory_utilization=VLLM_GPU_MEMORY_UTILIZATION, 
+            trust_remote_code=True,
+            dtype="half", # note: bfloat16 is not supported on nvidia-T4 GPUs
+            enforce_eager=True
+        )
+        self.tokenizer = self.llm.get_tokenizer()
+
+
+
+    def get_batch_size(self) -> int:
+        """
+        Determines the batch size that is used by the evaluator when calling the `batch_predict` function.
+
+        Returns:
+            int: The batch size, an integer between 1 and 16. This value indicates how many
+                 queries should be processed together in a single batch. It can be dynamic
+                 across different batch_predict calls, or stay a static value.
+        """
+        self.batch_size = AICROWD_SUBMISSION_BATCH_SIZE
+        return self.batch_size
+
+    def batch_predict(self, batch: Dict[str, Any], is_multiple_choice:bool) -> List[str]:
+        """
+        Generates a batch of prediction based on associated prompts and task_type
+
+        For multiple choice tasks, it randomly selects a choice.
+        For other tasks, it returns a list of integers as a string,
+        representing the model's prediction in a format compatible with task-specific parsers.
+
+        Parameters:
+            - batch (Dict[str, Any]): A dictionary containing a batch of input prompts with the following keys
+                - prompt (List[str]): a list of input prompts for the model.
+    
+            - is_multiple_choice bool: A boolean flag indicating if all the items in this batch belong to multiple choice tasks.
+
+        Returns:
+            str: A list of predictions for each of the prompts received in the batch.
+                    Each prediction is
+                           a string representing a single integer[0, 3] for multiple choice tasks,
+                        or a string representing a comma separated list of integers for Ranking, Retrieval tasks,
+                        or a string representing a comma separated list of named entities for Named Entity Recognition tasks.
+                        or a string representing the (unconstrained) generated response for the generation tasks
+                        Please refer to parsers.py for more details on how these responses will be parsed by the evaluator.
+        """
+        prompts = batch["prompt"]
+        
+        # format prompts using the chat template
+        formatted_prompts = self.format_prommpts(prompts)
+        # set max new tokens to be generated
+        max_new_tokens = 100 
+        
+        if is_multiple_choice:
+            max_new_tokens = 1 # For MCQ tasks, we only need to generate 1 token
+        
+        
+        # Generate responses via vllm
+        responses = self.llm.generate(
+            formatted_prompts,
+            vllm.SamplingParams(
+                n=1,  # Number of output sequences to return for each prompt.
+                top_p=0.9,  # Float that controls the cumulative probability of the top tokens to consider.
+                temperature=0,  # randomness of the sampling
+                seed=AICROWD_RUN_SEED, # Seed for reprodicibility
+                skip_special_tokens=True,  # Whether to skip special tokens in the output.
+                max_tokens=max_new_tokens,  # Maximum number of tokens to generate per output sequence.
+            ),
+            use_tqdm = False
+        )
+        # Aggregate answers into List[str]
+        batch_response = []
+        for response in responses:
+            batch_response.append(response.outputs[0].text)        
+            
+        if is_multiple_choice:
+            print("MCQ: ", batch_response)
+
+        return batch_response
+
+    def format_prommpts(self, prompts):
+        """
+        Formats prompts using the chat_template of the model.
+            
+        Parameters:
+        - queries (list of str): A list of queries to be formatted into prompts.
+            
+        """
+        system_prompt = "You are a helpful online shopping assistant. Please answer the following question about online shopping and follow the given instructions.\n\n"
+        formatted_prompts = []
+        for prompt in prompts:
+            formatted_prompts.append(system_prompt + prompt)
+
+        return formatted_prompts

requirements.txt

 torch
+vllm>=0.4.2
+loguru

requirements_eval.txt

@@ -3,5 +3,5 @@ pandas
 sentence-transformers
 rouge_score
 evaluate
-sacrebleu
-sacrebleu[ja]
\ No newline at end of file
+sacrebleu==2.4.1
+sacrebleu[ja]