input: 
  def sql_to_pandas_df(sql_query: str, conn) -> pd.DataFrame:
      """ Convert a given SQL query into a Pandas DataFrame.
  
      >>> sql_to_pandas_df("SELECT * FROM book;", conn)
      pd.DataFrame
      """
      import pandas as pd
      return pd.read_sql_query(sql_query, conn)
  
output:     import pandas as pd
      return pd.read_sql_query(sql_query, conn)