If I want to match spaces between Chinese characters and English characters (in either order), as well as spaces between Chinese characters themselves, what regex should I use? #regex

cn_en.py

import re

def remove_spaces(text):
    pattern = re.compile(r'(?<=\p{Script=Han})\s+(?=\p{Script=Han}|\p{Script=Latin})|(?<=\p{Script=Latin})\s+(?=\p{Script=Han})')
    return pattern.sub('', text)

Here's the breakdown:

• (?<=\p{Script=Han}) is a positive lookbehind assertion that ensures the match is preceded by a Chinese character (Han script).
• \s+ matches one or more whitespace characters (spaces, tabs, newlines, etc.).
• (?=\p{Script=Han}|\p{Script=Latin}) is a positive lookahead assertion that ensures the match is followed by either a Chinese character (Han script) or an English character or other Latin script character.
• | is the alternation operator, which allows matching either the expression before or after it.
• (?<=\p{Script=Latin}) is a positive lookbehind assertion that ensures the match is preceded by an English character or other Latin script character.
• (?=\p{Script=Han}) is a positive lookahead assertion that ensures the match is followed by a Chinese character (Han script).

This regex will match spaces in the following cases:

• Between Chinese characters and English (or other Latin script) characters, in either order.
• Between Chinese characters themselves.

For example:

• For the string "你好 world! 这是 一个 example.", the regex will match the space between "你好" and "world!", the space between "这是" and "一个", and the space between "一个" and "example.".
• For the string "This is an 例子 of mixed 语言.", the regex will match the space between "an" and "例子", as well as the space between "mixed" and "语言.".

As mentioned earlier, the \p{Script=Han} and \p{Script=Latin} syntax for matching characters based on their Unicode script properties may not be supported in all regex flavors. It is supported in many modern programming languages and regex libraries, such as Python, Java, and the .NET framework, but you should check the specific documentation of the language or library you are using to ensure compatibility.

If your regex flavor doesn't support the \p{Script=...} syntax, you can replace \p{Script=Han} with [\u4e00-\u9fff] to match Chinese characters, and \p{Script=Latin} with [a-zA-Z] to match English letters.