str.isdecimal() 和 str.isdigit() 区别示例 [英] str.isdecimal() and str.isdigit() difference example
问题描述
阅读 python 文档 我已经来到 .isdecimal() 和 .isdigit() 字符串函数,我没有找到关于它们可用区别的文献.有人可以向我提供这两个函数区别的代码示例吗.
类似行为:
<预><代码>>>>str.isdecimal('1')真的>>>str.isdigit('1')真的>>>str.isdecimal('1.0')错误的>>>str.isdigit('1.0')错误的>>>str.isdecimal('1/2')错误的>>>str.isdigit('1/2')错误的存在 差异,但很少见*.主要是各种unicode字符,比如2
:
您还可以使用 isnumeric
方法进一步深入了解 unicode 区分兔子洞:
<小时>
*至少,我从未遇到过需要区分包含这些异常情况的不同类型的字符串的生产代码,但肯定在某处存在用例.
Reading python docs I have come to .isdecimal() and .isdigit() string functions and i'm not finding literature too clear on their usable distinction. Could someone supply me with code examples of where these two functions differentiate please.
Similar behaviour:
>>> str.isdecimal('1')
True
>>> str.isdigit('1')
True
>>> str.isdecimal('1.0')
False
>>> str.isdigit('1.0')
False
>>> str.isdecimal('1/2')
False
>>> str.isdigit('1/2')
False
There are differences, but they're somewhat rare*. It mainly crops up with various unicode characters, such as 2
:
>>> c = '\u00B2'
>>> c.isdecimal()
False
>>> c.isdigit()
True
You can also go further down the careful-unicode-distinction rabbit hole with the isnumeric
method:
>>> c = '\u00BD' # ½
>>> c.isdecimal()
False
>>> c.isdigit()
False
>>> c.isnumeric()
True
*At least, I've never encountered production code that needs to distinguish between strings that contain different types of these exceptional situations, but surely use cases exist somewhere.
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