Find and replace to capitalize with Regex

[hermobot]

I need to capitalize letters that go after a exclamation or question mark and an space.

So this:
'Are you there? yes! perfect'

becomes to this:
'Are you there? Yes! Perfect'

I manage to find them with this pattern ([!?])\s[a-z] but i dont know what to put in the replace so that just the letter become uppercase/capitalize

pattern = '([!?])\s[a-z]'
replace = ''

new_string = re.sub(pattern, replace, text_2)
print(new_string)

Thank you for your help! :)

[snippsat]

Change the pattern to ([!?]\s[a-z]).
Now do group 1 match exclamation/question mark and letter.
Then can write a function to use in replacement of re.sub().

import re

def replacement(match):
    return match.group(1).upper()

text_2 = 'Are you there? yes! perfect'
pattern = r'([!?]\s[a-z])'
new_string = re.sub(pattern, replacement, text_2)
print(new_string)

Output:
Are you there? Yes! Perfect

[hermobot]

That worked perfectly!

Thank you very much!