How to replace a certain digit number within a string in python3?

Question

I'm trying to use str.replace to replace the 5 digit numbers in my string and the following does not work:

print((str.replace(\d\d\d\d\d, "n"))

Possible duplicate of [Replacing digits with str.replace()](https://stackoverflow.com/questions/19084443/replacing-digits-with-str-replace) — B. Go, Nov 23 '19 at 18:43
Welcome to Stack Overflow! Check out the [tour]. Your code has at least two syntax errors, but you can [edit] to fix it. — wjandrea, Nov 23 '19 at 18:43

score 1 · Accepted Answer · answered Nov 23 '19 at 18:46

str.replace doesn't support regular expressions. For that use re.sub.

import re
s = 'I have 12345 cows'
print(re.sub(r'\d{5}', "n", s))  # -> I have n cows

Breakdown

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