re.sub with exception or condition

Question

I want to sub use re.sub to substitute all the words with parentheses but not the word (k), I want to use some negation conditions but it seems not working to my example.

I've tried

 \((?<!k)\w+\)

Is there any suggestions?

re.sub(r'\((?<!k)\w+\)', '', '(k) i am, us dep economy (applause) (ph)', flags= re.IGNORECASE)

Desired result would be

(k) i am, us dep economy

score 3 · Accepted Answer · answered Feb 18 '18 at 21:30

3

Use a negative lookahead:

\((?!k\))\w+\)

(?!k\) makes sure k) does not come after the initial (

So:

In [75]: re.sub(r'\((?!k\))\w+\)', '', '(k) i am, us dep economy (applause) (ph)', flags= re.IGNORECASE)
Out[75]: '(k) i am, us dep economy  '

answered Feb 18 '18 at 21:30

heemayl

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What does `w+` signify? – haxtar Jul 31 '18 at 15:26
1

@haxtar Not `w+`, its `\w+`, which signifies one or more (`+`) of alphanumerics or underscore (`\w`). – heemayl Jul 31 '18 at 15:29
@haxtar Not `w+`, its `\w+`, which signifies one or more (`+`) of alphanumerics or underscore (`\w`). – heemayl Jul 31 '18 at 15:29

re.sub with exception or condition

1 Answers1