works fine:
import re
echo find("uabyxabyzc", re"ab.z") # found pattern "ab.z" at position 5
when I flip from re to regex:
import regex # <== change "re" to "regex"
echo find("uabyxabyzc", re"ab.z") # found pattern "ab.z" at position 5
whoops - "re" and "regex" are different :-) ... read the manual ... :
import regex
match "uabyxabyzc", rex"ab.z":
echo matches