Is there a way to remove etters and numbers except 'a' and 'I'

Asked Apr 09 '20 at 21:16

Active Apr 09 '20 at 21:16

Viewed 29 times

I have a string:

'I will g go to a walk d today'

I need to convert it into:

'I will go to a walk today'

I tried to use:

re.sub(r'\b[A-Za-z0-9]\b', ' ', 'I will g go to a walk d today')

But I am getting:

'  will   go to   walk   today'

How can I exclude 'I' and 'a' from RegEx?

asked Apr 09 '20 at 21:16

illuminato

1

`\b(?![aI]\b)[A-Za-z0-9]+\b` – Wiktor Stribiżew Apr 09 '20 at 21:19
1

re.sub(r'\b[A-HJ-Zb-z0-9]\b', ' ', v) – non87 Apr 09 '20 at 21:20
@WiktorStribiżew your code doesn't work. – illuminato Apr 09 '20 at 21:27
it gives: 'I a ' – illuminato Apr 09 '20 at 21:28
Just remove `+`, it is a typo, `\b(?![aI]\b)[A-Za-z0-9]\b`. The point is to use a lookahead in your original pattern, it will restrict the pattern. – Wiktor Stribiżew Apr 09 '20 at 21:29
@WiktorStribiżew Thanks. What if I have a sentence: "i'm still working on here. I will go to a walk today. it's gotta be very soon". How can I prevent deleting 's' and 'm'? – illuminato Apr 09 '20 at 21:44
Add `(?<!\b')` after the first `\b`. – Wiktor Stribiżew Apr 09 '20 at 21:45
@WiktorStribiżew Thanks. Do I understand correctly that A(?!B) matches the expression A = \b(?<!\b' only if it is not followed by B = [aIi]\b ? – illuminato Apr 09 '20 at 22:24
`A(?!B)` = match `A` not immediately followed with `B`. – Wiktor Stribiżew Apr 09 '20 at 22:53

0 Answers0