2.4 python中的字符串、索引和截取 [python入门教程]

        字符串可以用单引号，双引号，三引号成对括起来，索引用[]界定，切片用[:]来省略和连接，这点类似于Matlab。

>>> s1='Python'>>> s2=' is cool!'>>> str=s1+s2>>> str'Python is cool!'>>> str[0]'P'>>> str[2:5]'tho'>>> str[:2]'Py'>>> str[3:]'hon is cool!'>>> str*2'Python is cool!Python is cool!'>>> '-'*8'--------'>>> str[-1]'!'

        字符串下标从0开始，最后一个字符的索引是-1。加号来连接，*用来重复。

>>> str2='Python\n is cool!'>>> str2'Python\n is cool!'>>> print str2Python is cool!