Python replace front substring and back substring

Question

Let's say I have a string "abc_123_def" and I want to "remove" "abc_" and "_def" and be left with "123".

I currently have two replace statements:

s = "abc_123_def"
s.replace("abc_",'')
s.replace("_def",'')

Is there a better, one-liner way to do so?

Rob Kwasowski · Accepted Answer · 2019-07-22 16:53:04Z

1

s = "abc_123_def"
s = s.replace("abc_",'').replace("_def",'')

answered Jul 22, 2019 at 16:52

Rob Kwasowski

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3 Comments

I didn't realize python let you chain methods like that!

Any decent language will let you chain calls like that so long as the call returns a value.

Yes because s.replace("abc_",'') returns a string, which can then be put into another function call.

Praveenkumar · Accepted Answer · 2019-07-22 16:53:32Z

0

You can use regex like below, to exactly identify the values between underscores.

>>> import re
>>> s = 'abc_123_def'
>>> re.findall('_(.*?)_', s)[0]
'123'
>>>

answered Jul 22, 2019 at 16:53

Praveenkumar

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