字符串在Python中如何表达出来
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
>>> '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
2.使用双引号将字符串扩起来
>>> "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
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
>>> '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
4.通过单引号,双引号混合的方式输出单引号,双引号
>>> '"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
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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