Python程序通过CUPS打印“hello world”？

Question

import cups
conn = cups.Connection()
printers = conn.getPrinters()
printer_name = printers.keys()[0]
conn.printFile(printer_name,'/home/pi/Desktop/tempprint.jpg',"Hello",{}) 

如何将printFile更改为打印文本示例“hello world”？不是档案。 谢谢