unicodedata.normalize(form，unistr)如何工作? [英] How does unicodedata.normalize(form, unistr) work?

问题描述

在API文档上， http://docs.python. org/2/library/unicodedata.html#unicodedata.normalize .它说

On the API doc, http://docs.python.org/2/library/unicodedata.html#unicodedata.normalize. It says

返回Unicode字符串 unistr 的普通形式 form .表单的有效值为"NFC"，"NFKC"，"NFD"和"NFKD".

Return the normal form form for the Unicode string unistr. Valid values for form are ‘NFC’, ‘NFKC’, ‘NFD’, and ‘NFKD’.`

文档含糊不清，有人可以用一些示例解释valid values吗?

The documentation is rather vague, can someone explain the valid values with some examples?

推荐答案

我发现文档非常清晰，但是这里有一些代码示例:

I find the documentation pretty clear, but here are a few code examples:

from unicodedata import normalize

print '%r' % normalize('NFD', u'\u00C7')  # decompose: convert Ç to "C + ̧"
print '%r' % normalize('NFC', u'C\u0327') # compose: convert "C + ̧" to Ç

两个'D'(=分解)形式都将单个组合字符(如ä)转换为两个字符(a +两个点).两种'C'(= compose)形式都相反.

Both 'D' (=decompose) forms convert a single combined character (like ä) into two characters (a + two dots). Both 'C' (=compose) forms do the reverse.

两个"K"形式用于转换添加到Unicode的字符，以实现兼容性.例如，为了支持不能在符号周围画圆的软件，有一组带圆圈的数字"，例如①(统一编号2460).当我们对其应用规范分解(NFD)时，它无能为力:

The two "K" forms are used to convert characters added to Unicode for compatibility purposes. For example, to support software that cannot draw circles around symbols, there is a set of "circled numbers", like ① (unicode number 2460). When we apply the canonical decomposition (NFD) to it, it doesn't do anything:

print '%r' % normalize('NFD', u'\u2460')     # u'\u2460'

但是，兼容性分解(NFKD)将返回相应的兼容"字符:

However, the compatibility decomposition (NFKD) will return the corresponding "compatible" character:

print '%r' % normalize('NFKD', u'\u2460')    # 1

有关更多详细信息，请参见 http://en.wikipedia.org/wiki/Unicode_equivalence .

See http://en.wikipedia.org/wiki/Unicode_equivalence for more details.

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