Regex to find words with letters at start and end usign variables in python?

Question

I am trying to find words that begin with a certain letter, and end with another, using variables and regex. This is the expression and input I am using, am I going wrong anywhere?

start = str(input("What should it start with?"))
end = str(input("What should it end with?"))
words = re.findall(r"\b"+ start +"\w*?"+ end +"\b", dictionary)

Dictionary is a file I open containing some words.

Did you run it? What did you get? What did you expect? – Toto Jun 13 '20 at 15:49 — Toto, Jun 13 '20 at 15:49
@Toto I got null, just an empty string – Chadderbox Jun 13 '20 at 16:00 — Chadderbox, Jun 13 '20 at 16:00
Maybe a good usecase for f-strings. – JvdV Jun 13 '20 at 16:26 — JvdV, Jun 13 '20 at 16:26

score 1 · Accepted Answer · answered Jun 13 '20 at 16:01

1

Make sure to use r for the other string patterns:

words = re.findall(r"\b" + start + r"\w*?" + end + r"\b", dictionary)

answered Jun 13 '20 at 16:01

ywbaek

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Regex to find words with letters at start and end usign variables in python?

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