如何在Python列表中的“任何数字+分隔符”前面添加分隔符（＃）

Question

Hi I am new to python.

Current List:

current_list = ['Good 33912#This ice 989 cream is so sweet1345#That's a very good bar']

I want to have:

new_list = ['Good #33912#This ice 989 cream is so sweet#1345#That's a very good bar']

I want to add a delimiter(#) in front of "some digits and hash(#)" wherever found in the list. Please help

Answer 1

You can use re.sub for searching and substituting string patterns (using back reference):

import re

current_list = ["Good 33912#This ice cream is so sweet1345#That's a very good bar"]

new_list = [re.sub(r'(\d+#)', r'#\1', i) for i in current_list]
print(new_list)

Output:

["Good #33912#This ice cream is so sweet#1345#That's a very good bar"]

Here is explanation of regex string on Regex101.