python應(yīng)用操作——多行字符串

基本的方式是使用源于 C 語言的反斜杠：

In [20]: multistr = " select * from multi_row \

    ...: where row_id < 5"

In [21]: multistr

Out[21]: ' select * from multi_row where row_id < 5'

另一個(gè)技巧是使用三引號

In [23]: multistr ="""select * from multi_row

    ...: where row_id < 5"""

In [24]: multistr

Out[24]: 'select * from multi_row \nwhere row_id < 5'

上面方法共有的問題是缺少合適的縮進(jìn)，如果我們嘗試縮進(jìn)會在字符串中插入空格。所以最后的解決方案是將字符串分為多行并且將整個(gè)字符串包含在括號中：

In [25]: multistr = ("select * from multi_row "

    ...: "where row_id < 5 "

    ...: "order by age")  

In [26]: multistr

Out[26]: 'select * from multi_row where row_id < 5 order by age'