Regex Python adding characters after a certain word

Question

I have a text file and every time that the word "get" occurs I need to insert an @ sign after it.

In Python how do I add a character after a specific word using regex? Right now I am parsing the line word by word and I don't understand regex enough to write the code.

Answer 1

Use re.sub() to provide replacements, using a backreference to re-use matched text:

import re

text = re.sub(r'(get)', r'1@', text)

The (..) parenthesis mark a group, which 1 refers to when specifying a replacement. So get is replaced by get@.

Demo:

>>> import re
>>> text = 'Do you get it yet?'
>>> re.sub(r'(get)', r'1@', text)
'Do you get@ it yet?'

The pattern will match get anywhere in the string; if you need to limit it to whole words, add anchors:

text = re.sub(r'(get)', r'1@', text)