How to find a word in a string by criteria?

Question

Python

There is a line: "new version - version1". How to find the word version1 by: only English letters, by the presence of numbers, by the number of characters - in this case there are 7 of them. And all these 3 conditions are mandatory.

Those. there can be several lines, but a word must be found from them according to the criteria
Examples:
"new version yesterday - version1" | Finds: version1
"new version today is version2" | Finds: version2
"new version tomorrow - version3". | Finds: version3

Answer 1

Use regular expressions:

import re
s = "новая версия вчера - version1"
r = re.search(r'[a-zA-Z]{7}\d', s)
print(r.group())

https://regex101.com/r/tQELMd/1