input: 
  def sql_to_pandas(sql_query: str, conn) -> pd.DataFrame:
      """
      Convert a given SQL statement into a Python Pandas DataFrame.
      >>> sql_to_pandas("SELECT * FROM book;", conn)
         id title  author_id
      0   1  Book1         10
      1   2  Book2         11
      2   3  Book3         12
      """
  
output:     return pd.read_sql(sql_query, conn)