try:
  print(a)
except Exception as e:
  print(e)
  print(e.__traceback__.tb_frame.f_globals["__file__"])  # 发生异常所在的文件
  print(e.__traceback__.tb_lineno)            # 发生异常所在的行数

try(){

}catch(Exception e){

}

ByteArrayOutputStream baos = new ByteArrayOutputStream(); 

      e.printStackTrace(new PrintStream(baos)); 
      String exception = baos.toString(); 
      System.out.println("baos:" + exception);