Replace number in a string in python

Question

Say I have a this string:

text = "bla bl4a 12 bla 23 bla"

I want to replace all the numbers that are not a part of a word with a token <num>.

I know I can replace all numbers of a string like this:

text = re.sub(r"(\d+)", "<num>", text)

Unfortunately this also replace bl4a with bl<num>a. This should be the output:

"bla bl4a <num> bla <num> bla"

score 5 · Accepted Answer · answered Sep 05 '22 at 10:50

5

Match word boundaries either side of the number

re.sub(r"\b\d+\b", "<num>", text)

answered Sep 05 '22 at 10:50

Iain Shelvington

Alternative without regular expression could be `" ".join("" if s.isdecimal() else s for s in text.split())` – Olvin Roght Sep 05 '22 at 10:52

1 Answers1