Python使用re.sub进行匹配后替换

目标：

":method: Put :scheme: http"

替换为

"method: Put scheme: http"

方法

>>> import re
>>> line = ":method: Put :scheme: http"
>>> re.sub(r":\w+", lambda m: f"{m.group()[1:]}", line)
'method: Put scheme: http'

---

re.match 从头进行查找，找不到就立即返回空
re.search 从全文中进行查找，到结尾还没找到就返回空

参考：
https://www.runoob.com/python/python-reg-expressions.html
https://www.runoob.com/regexp/regexp-syntax.html