add readme

ChemLLMBench_eval_data/README.md

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+# How to format these data into inputs
+
+For the jsonline file where the `"few_shots_examples"` key is absent in the data:
+
+```python
+text = item['question'] + item['input_format'].format(item['input']) if 'input_format' in item else item['question']
+inputs = f"[Round 0]\nHuman: {text.strip()}\nAssistant:"
+```
+
+For the jsonline file where the `"few_shots_examples"` key is present in the data:
+
+```python
+inputs = f"[Round 0]\nHuman: {raw['question'].strip()}\nAssistant: OK."
+for idx, fs in enumerate(raw['few_shots_examples']):
+    inputs += f"\n[Round {idx + 1}]\nHuman: {raw['input_format'].format(fs['human'].strip())}\nAssistant: {fs['assistant'].strip()}"
+inputs += f"\n[Round {len(raw['few_shots_examples']) + 1}]\nHuman: {raw['input_format'].format(raw['input'].strip())}\nAssistant:"
+```