1、format()，為要插入的變量留出一個空間 ``` greeting = "Good {},{}.How are you doing" name = "sanqian" time = "morning" print greeting.format(name,time) ``` 2、format()，加入帶有鍵的花括號 ``` specials_text = "Good {time}! Today's specials are:{special} and {special2}" time = "afternoon" food1 = "spam with eggs" food2 = "eggs with spam" print specials_text.format(time = time,special = food1,special2 = food2) ``` 3、format()，變量位置用整數來填充![] ``` line = "cities with python meeet-ups:{0},{1},{2}" print line.format("district of columbia","portland","and many more!") ```