Usage

import pandas as pd
from datasets import load_dataset
from transformers import MBartForConditionalGeneration
model = MBartForConditionalGeneration.from_pretrained("vaishali/BnTQA-mBart")
tokenizer = AutoTokenizer.from_pretrained(args.pretrained_model_name, src_lang="bn_IN", tgt_lang="bn_IN")
forced_bos_id = forced_bos_token_id = tokenizer.lang_code_to_id["bn_IN"]


# linearize table
def process_header(headers: List):
  return "<কলাম> " + " | ".join(headers)

def process_row(row: List, row_index: int):
  en2bnDigits = {'0': '০',  '1': '১', '2': '২', '3': '৩', '4': '৪', '5': '৫', '6': '৬', '7': '৭', '8': '৮', '9': '৯', '.': '.'}
  row_str = ""
  row_cell_values = []
  for cell_value in row:
      if isinstance(cell_value, int) or isinstance(cell_value, float):
          cell_value = convert_engDigit_to_bengali(str(cell_value))
          row_cell_values.append(str(cell_value))
      else:
          row_cell_values.append(cell_value)
  row_str += " | ".join(row_cell_values)
  bn_row_index = []
  for c in str(row_index):
      bn_row_index.append(en2bnDigits[c])
  return "<রো " + "".join(bn_row_index) + "> " + row_str

def process_table(table_content: Dict):
  table_str = process_header(table_content["header"]) + " "
  for i, row_example in enumerate(table_content["rows"]):
      table_str += process_row(row_example, row_index=i + 1) + " "
  return table_str.strip()

# load the dataset
banglatableQA = load_dataset("vaishali/banglaTabQA")

for sample in banglatableQA['train']:
  question = sample['question']
  input_table = pd.read_json(sample['table'], orient='split')
  answer = pd.read_json(sample['answer'], orient='split')

  # create the input sequence: query + linearized input table
  table_content = {"header": list(input_table.columns)[1:], "rows": [list(row.values)[1:] for i, row in input_table.iterrows()]}
  linearized_inp_table = process_table(table_content)
  linearized_output_table = process_table({"name": None, "header": [translate_column(col) for col in list(answer.columns)], 
                             "rows": [list(row.values) for i, row in answer.iterrows()]})
  source = query + " " + linearized_inp_table
  target = linearized_output_table
  input = tokenizer(source,
                    return_tensors="pt",
                    padding="max_length",
                    truncation="longest_first",
                    max_length=1024,
                    add_special_tokens=True)

  with tokenizer.as_target_tokenizer():
    labels = tokenizer(target,
               return_tensors="pt",
               padding="max_length",
               truncation="longest_first",
               max_length=1024,
               add_special_tokens=True).input_ids

  # inference
  out = model.generate(input["input_ids"].to("cuda"), num_beams=5, return_dict_in_generate=True,
                                output_scores=True, max_length=1024)

BibTeX entry and citation info

@inproceedings{pal-etal-2024-table,
    title = "Table Question Answering for Low-resourced {I}ndic Languages",
    author = "Pal, Vaishali  and
      Kanoulas, Evangelos  and
      Yates, Andrew  and
      de Rijke, Maarten",
    editor = "Al-Onaizan, Yaser  and
      Bansal, Mohit  and
      Chen, Yun-Nung",
    booktitle = "Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing",
    month = nov,
    year = "2024",
    address = "Miami, Florida, USA",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2024.emnlp-main.5",
    pages = "75--92",
    abstract = "TableQA is the task of answering questions over tables of structured information, returning individual cells or tables as output. TableQA research has focused primarily on high-resource languages, leaving medium- and low-resource languages with little progress due to scarcity of annotated data and neural models. We address this gap by introducing a fully automatic large-scale tableQA data generation process for low-resource languages with limited budget. We incorporate our data generation method on two Indic languages, Bengali and Hindi, which have no tableQA datasets or models. TableQA models trained on our large-scale datasets outperform state-of-the-art LLMs. We further study the trained models on different aspects, including mathematical reasoning capabilities and zero-shot cross-lingual transfer. Our work is the first on low-resource tableQA focusing on scalable data generation and evaluation procedures. Our proposed data generation method can be applied to any low-resource language with a web presence. We release datasets, models, and code (https://github.com/kolk/Low-Resource-TableQA-Indic-languages).",
}