How to insert variable value to already existing string python?

How to Insert variable value to string python?
I need to insert ‘g’ value to {g} in html text.

tried f string and it doesn’t work

>Solution :

You can use str.format to insert value into {g} in your example

g = 234

text = '''
<p>Hi {g}!</p>
'''

print(text.format(g=g))