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models/__init__.py

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+# This file is intentionally left blank.

models/excel_models.py

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+from pydantic import BaseModel
+from typing import List, Dict, Any
+
+class Cell(BaseModel):
+    value: str
+    format: Dict[str, Any]
+
+class Sheet(BaseModel):
+    name: str
+    cells: List[List[Cell]]
+
+class ExcelFile(BaseModel):
+    sheets: List[Sheet]