A super easy (but useful) script to insert whitespaces to English words which are adjacent to Chinese.

intert_white_spaces.py

import re
import sys

def insert_spaces(text):
    text = re.sub(r'([a-zA-Z])([\u4e00-\u9fa5])', r'\1 \2', text)
    text = re.sub(r'([\u4e00-\u9fa5])([a-zA-Z])', r'\1 \2', text)
    return text


if __name__ == '__main__':
    if len(sys.argv)!= 2:
        print('Usage: python replace.py <markdown_file>')

    md_file = sys.argv[1]

    # read file
    with open(md_file, 'r', encoding='utf-8') as file:
        content = file.read()

    # insert spaces between Chinese and English words
    content = insert_spaces(content)

    # write modified content back to the file
    with open(md_file, 'w', encoding='utf-8') as file:
        file.write(content)