I have something like this in my code:
cust.main.city
I need to find all such occurrences where it has atleast 2 dots I mean references.
So i tried this
[].+.[].+
but it also gave me :
cust.Res;
I only want those lines which has atleast 2 dots (.) in it so I can check further.
Request you to please guide me.
Have you tried back slash escape for the period?
import re
pattern = r"^\w+\.\w+\.\w+$"
re.match(pattern, "cust.main.city")
Your [].+.[].+ regex is a misleading pattern. It matches a single char from a [].+.[] character class (that is, ], ., + and [) and then matches 1 or more chars other than newline chars (i.e. the rest of the line).
You may match those entities with
\w+(?:\.\w+){2,}
Details
\w+ - 1 or more word chars (digits, letters, _ and some other Unicode chars)(?: - start of a non-capturing group (see also SO reference):
\. - a literal dot char\w+ - 1 or more word chars){2,} - end of the group that will be repeated 2 or more times.See the regex demo.