feat: update model_experiment.py to support basic EDA (microsoft#220)

* Update model_experiment.py to support basic eda

It looks into the data first before the proposal.

* Update model_experiment.py

Revised linting

* Update model_experiment.py by fixing sorting order

* Update model_experiment.py for black linting

* Update model_experiment.py

* Update model_experiment.py

* Update model_experiment.py

* Update model_experiment.py

---------

Co-authored-by: WinstonLiyt <104308117+WinstonLiyt@users.noreply.github.com>

Author: xisen-w

rdagent/scenarios/kaggle/experiment/model_experiment.py

@@ -1,6 +1,7 @@
 import json
 from pathlib import Path
 
+import pandas as pd
 from jinja2 import Environment, StrictUndefined
 
 from rdagent.components.coder.model_coder.model import (
@@ -77,12 +78,34 @@ def background(self) -> str:
                 competition_features=self.competition_features,
             )
         )
-
         return background_prompt
 
     @property
     def source_data(self) -> str:
-        raise NotImplementedError("source_data is not implemented")
+        kaggle_conf = KGDockerConf()
+        data_path = Path(f"{kaggle_conf.share_data_path}/{self.competition}")
+
+        csv_files = list(data_path.glob("*.csv"))
+
+        if not csv_files:
+            return "No CSV files found in the specified path."
+
+        dataset = pd.concat([pd.read_csv(file) for file in csv_files], ignore_index=True)
+
+        simple_eda = dataset.info(buf=None)  # Capture the info output
+        data_shape = dataset.shape
+        data_head = dataset.head()
+
+        eda = (
+            f"Basic Info about the data:\n{simple_eda}\n"
+            f"Shape of the dataset: {data_shape}\n"
+            f"Sample Data:\n{data_head}\n"
+        )
+
+        data_description = self.competition_descriptions.get("Data Description", "No description provided")
+        eda += f"\nData Description:\n{data_description}"
+
+        return eda
 
     @property
     def output_format(self) -> str: