python程序格式化字符%r输出问题？

0

python中字符格式%r输出的字符串会出现双引号吗？
代码：
formatter = "%r %r %r %r"

print formatter % ("I had this thing.",
"That you could type up right.",
"But it didn't sing.",
"So I said goodnight."
)
输出结果：'I had this thing.' 'That you could type up right.' "But it didn't sing." 'So I
said goodnight.'
输出发现第3个是双引号字符串，其他都是单引号字符。
请帮忙解释下，谢谢！
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    悟 - 取是能力，舍是境界 2017-02-08 回答

    这个很好解释，从编程来说字符串表示两种方式，双引号或者单引号。内容中有单引号了，所以输出结果就外面用双引号表示字符串，内容单引号正常显示，而没有去转译。你输出下下面的语句应该就能理解了。
    formatter = "%r %r %r %r"
    

    
print formatter % ("I had this thing.",
    
"That you could type up right.",
    
"But it didn't \" sing.",
    
"So I said goodnight."
    
)


     
    2017-02-08 1
    分享
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