Using regex with negative lookahead I have to search a text file and identify a partially known line of text that is NOT followed by another partially known line of text. This is a simplified example of the text file:
blahblahblah.Name=qwqwqwqwqw
abracadabra.Surname=ererererer
zxzxzxzxzx.Name=kmkmkmkmkmkm
oioioioi.Name=dfdfdfdfdfdf
popopopopopopo.Surname=lklklklklklklk
In the sample above you can see the pattern where a line with Name should always follow by a line with Surname , but sometimes it doesn't happen. I have to identify those "Name lines" which are not followed by the "Surname lines".
I am using File Search in Eclipse (it supports regex).
This is one of my best attempts, I guess, but it still doesn't do the trick:
(Name.*\\n)(?!.*Surname)
Please share your thoughts. Kind regards.
.*\\bName=.*\\n(?!.*\\bSurname=)
will do.
Below is an example in Python.
import re
s='''blahblahblah.Name=qwqwqwqwqw
abracadabra.Surname=ererererer
zxzxzxzxzx.Name=kmkmkmkmkmkm
oioioioi.Name=dfdfdfdfdfdf
popopopopopopo.Surname=lklklklklklklk'''
print(re.findall(r'\bName=.*\n(?!.*\bSurname=)', s))
This outputs:
['zxzxzxzxzx.Name=kmkmkmkmkmkm\n']
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.