CODEWITHSUNDEEP
pythonregex
LeoShi
LeoShi

Reputation: 1847

python how to replace string by regex group?

Give an string like '/apps/platform/app/app_name/etc', I can use

p = re.compile('/apps/(?P<p1>.*)/app/(?P<p2>.*)/')

to get two matched groups of platform and app_name, but how can I use re.sub function (or maybe better way) to replace those two groups with other string like windows and facebook? So the final string would like /apps/windows/app/facebook/etc.

Upvotes: 0

Views: 126

Answers (1)

Avinash Raj
Avinash Raj

Reputation: 174696

Separate group replacement wouldn't be possible through regex. So i suggest you to do like this.

(?<=/apps/)(?P<p1>.*)(/app/)(?P<p2>.*)/

DEMO

Then replace the matched characters with windows\2facebook/ . And also i suggest you to define your regex as raw string. Lookbehind is used inorder to avoid extra capturing group.

>>> s = '/apps/platform/app/app_name/etc'
>>> re.sub(r'(?<=/apps/)(?P<p1>.*)(/app/)(?P<p2>.*)/', r'windows\2facebook/', s)
'/apps/windows/app/facebook/etc'

Upvotes: 3

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