evaluate_model_outputs.py [20:35]:
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        if not all(col in df.columns for col in required_columns):
            raise ValueError(f"CSV must contain columns: {required_columns}")
        return df
    except Exception as e:
        raise Exception(f"Error loading CSV file: {str(e)}")

def serialize_sympy_object(obj: Any) -> str:
    """Convert sympy object to string representation."""
    if obj is None:
        return ""
    try:
        if isinstance(obj, (list, tuple)):
            return ", ".join(str(x) if x is not None else "" for x in obj)
        return str(obj)
    except Exception as e:
        return f"Error: {str(e)}"
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extract_answers.py [17:32]:
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        if not all(col in df.columns for col in required_columns):
            raise ValueError(f"CSV must contain columns: {required_columns}")
        return df
    except Exception as e:
        raise Exception(f"Error loading CSV file: {str(e)}")

def serialize_sympy_object(obj: Any) -> str:
    """Convert sympy object to string representation."""
    if obj is None:
        return ""
    try:
        if isinstance(obj, (list, tuple)):
            return ", ".join(str(x) if x is not None else "" for x in obj)
        return str(obj)
    except Exception as e:
        return f"Error: {str(e)}"
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