如何删除unicode字符串的标点？（无法删除quatation标记）

Question

import string
translate_table = dict((ord(char), None) for char in string.punctuation)   
tester=u'“What were the maester’s words?” Jaime asked.The bacon crunched when he bit into it.'
print sample.translate(translate_table)

- ＆gt;“什么是主人的话”Jaime问道，当他咬着它时，培根嘎吱作响

引号仍然存在。如何一次删除所有标点符号？