input: 
  def sql_to_dataframe(sql_query: str, conn) -> pd.DataFrame:
      """Convert a given SQL statement into a Python Pandas DataFrame.
      >>> sql_to_dataframe("SELECT * FROM book;", conn)
         id title  author
      0   1   The Great Gatsby  F. Scott Fitzgerald
      1   2   To Kill a Mockingbird  Harper Lee
      """
      import pandas as pd
      df = pd.read_sql_query(sql_query, conn)
      return df
  
output:     import pandas as pd
      df = pd.read_sql_query(sql_query, conn)
      return df