问一个 Python 正则表达式（将文本中所有 [] 内的第一个字符是大写字母的匹配的括号里的数字加上<sub></sub>标签）
abctest · May 3, 2017 · 2809 viewsThis topic created in 3292 days ago, the information mentioned may be changed or developed.
比如： [ CH4 ] -> [ CH<sub>4</sub>]
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1
noqwerty May 3, 2017
```python
import re x = '[ CH4 ]' regex = re.compile(r'(\[\s?[A-Z].*?)(\d)(\s?\])') print(re.sub(regex, r'\1<sub>\2</sub>\3', x)) # [ CH<sub>4</sub> ] ``` |
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