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Update metric.py
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metric.py
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# import re
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# import json
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# import evaluate
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# import datasets
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# _DESCRIPTION = """
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# Table evaluation metrics for assessing the matching degree between predicted and reference tables. It calculates the following metrics:
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# 1. Precision: The ratio of correctly predicted cells to the total number of cells in the predicted table
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# 2. Recall: The ratio of correctly predicted cells to the total number of cells in the reference table
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# 3. F1 Score: The harmonic mean of precision and recall
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# These metrics help evaluate the accuracy of table data extraction or generation.
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# """
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# _KWARGS_DESCRIPTION = """
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# Args:
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# predictions (`str`): Predicted table in Markdown format.
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# references (`str`): Reference table in Markdown format.
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# Returns:
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# dict: A dictionary containing the following metrics:
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# - precision (`float`): Precision score, range [0,1]
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# - recall (`float`): Recall score, range [0,1]
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# - f1 (`float`): F1 score, range [0,1]
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# - true_positives (`int`): Number of correctly predicted cells
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# - false_positives (`int`): Number of incorrectly predicted cells
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# - false_negatives (`int`): Number of cells that were not predicted
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# Examples:
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# >>> accuracy_metric = evaluate.load("accuracy")
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# >>> results = accuracy_metric.compute(
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# ... predictions="| | lobby | search | band | charge | chain ||--|--|--|--|--|--|| desire | 5 | 8 | 7 | 5 | 9 || wage | 1 | 5 | 3 | 8 | 5 |",
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# ... references="| | lobby | search | band | charge | chain ||--|--|--|--|--|--|| desire | 1 | 6 | 7 | 5 | 9 || wage | 1 | 5 | 2 | 8 | 5 |"
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# ... )
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# >>> print(results)
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# {'precision': 0.7, 'recall': 0.7, 'f1': 0.7, 'true_positives': 7, 'false_positives': 3, 'false_negatives': 3}
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# """
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# _CITATION = """
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# @article{scikit-learn,
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# title={Scikit-learn: Machine Learning in {P}ython},
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# author={Pedregosa, F. and Varoquaux, G. and Gramfort, A. and Michel, V.
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# and Thirion, B. and Grisel, O. and Blondel, M. and Prettenhofer, P.
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# and Weiss, R. and Dubourg, V. and Vanderplas, J. and Passos, A. and
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# Cournapeau, D. and Brucher, M. and Perrot, M. and Duchesnay, E.},
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# journal={Journal of Machine Learning Research},
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# volume={12},
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# pages={2825--2830},
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# year={2011}
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# }
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# """
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# @evaluate.utils.file_utils.add_start_docstrings(_DESCRIPTION, _KWARGS_DESCRIPTION)
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# class Accuracy(evaluate.Metric):
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# def _info(self):
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# return evaluate.MetricInfo(
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# description=_DESCRIPTION,
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# citation=_CITATION,
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# inputs_description=_KWARGS_DESCRIPTION,
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# features=datasets.Features(
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# {
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# "predictions": datasets.Value("string"),
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# "references": datasets.Value("string"),
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# }
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# ),
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# reference_urls=["https://scikit-learn.org/stable/modules/generated/sklearn.metrics.accuracy_score.html"],
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# )
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# def _extract_markdown_table(self,text):
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# text = text.replace('\n', '')
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# text = text.replace(" ","")
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# pattern = r'\|(?:[^|]+\|)+[^|]+\|'
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# matches = re.findall(pattern, text)
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# if matches:
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# return ''.join(matches)
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# return None
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# def _table_to_dict(self,table_str):
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# result_dict = {}
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# table_str = table_str.lstrip("|").rstrip("|")
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# parts = table_str.split('||')
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# parts = [part for part in parts if "--" not in part]
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# legends = parts[0].split("|")
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# rows = len(parts)
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# if rows == 2:
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# nums = parts[1].split("|")
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# for i in range(len(nums)):
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# result_dict[legends[i]]=float(nums[i])
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# elif rows >=3:
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# for i in range(1,rows):
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# pre_row = parts[i]
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# pre_row = pre_row.split("|")
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# label = pre_row[0]
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# result_dict[label] = {}
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# for j in range(1,len(pre_row)):
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# result_dict[label][legends[j-1]] = float(pre_row[j])
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# else:
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# return None
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# return result_dict
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# def _markdown_to_dict(self,markdown_str):
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# table_str = self._extract_markdown_table(markdown_str)
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# if table_str:
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# return self._table_to_dict(table_str)
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# else:
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# return None
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# def _calculate_table_metrics(self,pred_table, true_table):
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# true_positives = 0
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# false_positives = 0
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# false_negatives = 0
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# # 遍历预测表格的所有键值对
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# for key, pred_value in pred_table.items():
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# if key in true_table:
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# true_value = true_table[key]
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# if isinstance(pred_value, dict) and isinstance(true_value, dict):
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# nested_metrics = self._calculate_table_metrics(pred_value, true_value)
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# true_positives += nested_metrics['true_positives']
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# false_positives += nested_metrics['false_positives']
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# false_negatives += nested_metrics['false_negatives']
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# # 如果值相等
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# elif pred_value == true_value:
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# true_positives += 1
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# else:
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# false_positives += 1
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# false_negatives += 1
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# else:
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# false_positives += 1
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# # 计算未匹配的真实值
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# for key in true_table:
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# if key not in pred_table:
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# false_negatives += 1
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# # 计算指标
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# precision = true_positives / (true_positives + false_positives) if (true_positives + false_positives) > 0 else 0
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# recall = true_positives / (true_positives + false_negatives) if (true_positives + false_negatives) > 0 else 0
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# f1 = 2 * (precision * recall) / (precision + recall) if (precision + recall) > 0 else 0
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# return {
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# 'precision': precision,
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# 'recall': recall,
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# 'f1': f1,
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# 'true_positives': true_positives,
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# 'false_positives': false_positives,
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# 'false_negatives': false_negatives
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# }
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# def _compute(self, predictions, references):
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# predictions = "".join(predictions)
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# references = "".join(references)
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# return self._calculate_table_metrics(self._markdown_to_dict(predictions), self._markdown_to_dict(references))
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# def main():
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# accuracy_metric = Accuracy()
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# # 计算指标
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# results = accuracy_metric.compute(
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# predictions=["""
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# | | lobby | search | band | charge | chain ||--|--|--|--|--|--|| desire | 5 | 8 | 7 | 5 | 9 || wage | 1 | 5 | 3 | 8 | 5 |
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# """], # 预测的表格
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# references=["""
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# | | lobby | search | band | charge | chain ||--|--|--|--|--|--|| desire | 1 | 6 | 7 | 5 | 9 || wage | 1 | 5 | 2 | 8 | 5 |
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# """], # 参考的表格
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# )
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# print(results) # 输出结果
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# if __name__ == '__main__':
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# main()
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import re
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import json
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import evaluate
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import re
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import json
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import evaluate
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