python中是否存在“查找 - 替换整个单词”？

Question

Does "Find-Replace whole word only" exist in python?

eg "old string oldstring boldstring bold" if i want to replace 'old' with 'new', new string should look like,

"new string oldstring boldstring bold"

can somebody help me?

Answer 1

>>> import re
>>> s = "old string oldstring boldstring bold"
>>> re.sub(r'\bold\b', 'new', s)
'new string oldstring boldstring bold'

This is done by using word boundaries . Needless to say, this regex is not Python-specific and is implemented in most regex engines.

Answer 2

你需要以下正则表达式：

\bold\b