python - How do I write regex?

Question

s = u'\ud83d\udc8b'
co = re.compile( u'\ud83d\udc8b')
co.sub(u'',s)
print(u'ud83d ')

The output is as follows
UnicodeEncodeError: 'utf-8' codec can't encode character 'ud83d' in position 0: surrogates not allowed

s is probably a Weibo emoticon, but it couldn’t be displayed after working on it all afternoon. I thought about replacing it, but it couldn’t be matched. Why?

Answer 1

First of all, there are 2 questions
1. Why can’t it be displayed? 2. I want to replace it but why can’t it match?
Answer

1. Special encoding cannot be displayed on the terminal. If it is displayed on the UI, then the UI encoding needs to be set.

2. Try the following code

import re
s = u'hello \ud83d\udc8b world'
co = re.compile( u'\ud83d\udc8b')
ss = co.sub(u'',s)
print(ss)

Run result:

hello world

Answer 2

I copied them all