对于字符串,最通俗易懂理解的字面意思是一串字符。那么,在Python中如何表达字符串呢?接下来本文为大家详细讲解:
1.使用单引号扩起来字符串
<p style="line-height: 1.75em"><span>>>> 'my python lession' #以单引号将字符串扩起来 'my python lession' >>> a = 'my python lession' >>> print(a) my python lession<br /></span></p>
2.使用双引号将字符串扩起来
<p style="line-height: 1.75em"><span>>>> "my python lession" #使用双引号将字符串扩起来 'my python lession' >>> a = "my python lession" >>> print(a) my python lession<br /></span></p>
值得说明的是,被单引号(single quote)或双引号(double quotes)包围的字符串,这两者的作用是一样的:
3.当想要输出单引号或者双引号时(将单引号,双引号作为普通字符输出),通过 \ 进行转义
<p style="line-height: 1.75em"><span>>>> 'python \'escape' "python 'escape" >>> a = 'python \'escape' >>> print(a) python 'escape #通过\反斜线将单引号进行转移,不在乎最外层的是单引号还是双引号,反正是中间是字符串,有\就将后面的单引号,双引号进行转义 >>> >>> 'python \" escape' 'python " escape' >>> a = 'python \" escape' >>> print(a) python " escape >>> >>> "python \' escape" "python ' escape" >>> a = "python \' escape" >>> print(a) python ' escape >>> >>> "python \" escape" 'python " escape' >>> a = "python \" escape" >>> print(a) python " escape<br /></span></p>
4.通过单引号,双引号混合的方式输出单引号,双引号
<p style="line-height: 1.75em"><span>>>> '"double quote"' #单引号中,使用双引号,直接将双引号输出 '"double quote"' >>> a = '"double quote"' >>> print(a) "double quote" >>> >>> "'single quote'" #双引号中,使用单引号,将单引号输出 "'single quote'" >>> a = "'single quote'" >>> print(a) 'single quote' >>> >>> ""double"" #双引号中直接输出双引号报错 SyntaxError: invalid syntax >>> "\"double\"" #双引号中直接输出双引号报错,但是将其中的双引号通过反斜线进行转义就可以了 '"double"' >>> a = "\"double\"" >>> print(a) "double" >>> >>> ''single'' #单引号中输出单引号字符报错,加上转义字符就可以了。 SyntaxError: invalid syntax >>> '\'single\'' "'single'" >>> a = '\'single\'' >>> print(a) 'single' >>> '"My python', lession' #单引号中输出双引号可以,如有单引号,必须进行转义 SyntaxError: EOL while scanning string literal >>> '"My python\', lession' '"My python\', lession' >>> a = '"My python\', lession' >>> print(a) "My python', lession<br /></span></p>
学会了字符串在Python中的表达方式,在下篇中我们继续学习,让字符串在Python中拼接起来。
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