Python:如何用半角字符替换全角字符? [英] Python: How can I replace full-width characters with half-width characters?

问题描述

如果这是 PHP，我可能会这样做:

function no_more_half_widths($string){$foo = array('１','２','３','４','５','６','７','８','９','１０')$bar = array('1','2','3','4','5','6','7','8','9','10')返回 str_replace($foo, $bar, $string)}

我在 python 中尝试了 .translate 函数，它表明数组的大小不同.我认为这是因为单个字符以 utf-8 编码.有什么建议?

解决方案

内置的unicodedata模块可以做到:

<预><代码>>>>导入 unicodedata>>>foo = u'１２３４５６７８９０'>>>unicodedata.normalize('NFKC', foo)u'1234567890'

NFKC"代表规范化表格 KC [兼容性分解，然后是规范组合]"，并将全角字符替换为半角字符，即 Unicode 等效.>

请注意，它还同时规范了各种其他内容，例如单独的重音符号和罗马数字符号.

If this was PHP, I would probably do something like this:

function no_more_half_widths($string){
  $foo = array('１','２','３','４','５','６','７','８','９','１０')
  $bar = array('1','2','3','4','5','6','7','8','9','10')
  return str_replace($foo, $bar, $string)
}

I have tried the .translate function in python and it indicates that the arrays are not of the same size. I assume this is due to the fact that the individual characters are encoded in utf-8. Any suggestions?

解决方案

The built-in unicodedata module can do it:

>>> import unicodedata
>>> foo = u'１２３４５６７８９０'
>>> unicodedata.normalize('NFKC', foo)
u'1234567890'

The "NFKC" stands for "Normalization Form KC [Compatibility Decomposition, followed by Canonical Composition]", and replaces full-width characters by half-width ones, which are Unicode equivalent.

Note that it also normalizes all sorts of other things at the same time, like separate accent marks and Roman numeral symbols.

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