Is there any function to replace a variable in python string?

Question

I'm using python 3 and I just want to use only an efficient and effective single line of code for the following problem.

Suppose, I have a word and it has multiple combinations. I want to replace all the combinations with an efficient single line of code. For example,

s2 = 'Hello Donald. DONALD is playing with his son. His son loves to play with donald' 
s2.replace('Donald', 'John')

This replaces only Donald not DONALD and donald.

How can I replace all combinations ( Donald, DONALD, donald ) of Donald by John.

More explicitly :

s3 = 'NO No nO no'

I can use

s3.replace('NO', 'yes').replace('No', 'yes').replace('nO', 'yes').replace('no', 'yes')

But, the more combinations, the more replace functions. How can I use replace function effectively and efficiently to replace all combinations NO by yes.

Pruthvi Barot · Accepted Answer · 2020-03-06 10:30:28Z

4

import re
re.sub("(?i)no","yes", "no No nO NO") # yes yes yes yes

answered Mar 6, 2020 at 10:30

Pruthvi Barot

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user2390182 · Accepted Answer · 2020-03-06 10:32:25Z

2

You can use regular expressions and in particular re.sub in case-insensitive mode:

import re

re.sub('donald', 'john', 'DoNalD duck', flags=re.I)
# john duck

answered Mar 6, 2020 at 10:32

user2390182

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krishna · Accepted Answer · 2020-03-06 10:59:04Z

1

data_str = "No NO nO no".upper().replace('NO', 'YES')

print(data_str)

edited Mar 6, 2020 at 10:59

answered Mar 6, 2020 at 10:28

krishna

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1 Comment

KittoMi Over a year ago

Thank you @krishna

I-use-IT · Accepted Answer · 2020-03-06 10:41:15Z

0

If you also want to eliminate possible accents ÁÀÃÂÇÉÊÍÕÓÔÚáàãâçéêíõóôú you can first 'normalize' the char as in this regex-free code golf example When I grow up I want to be ASCII.

Then proceed to make all chars 'upper' or 'lower' and replace the desired string element.

answered Mar 6, 2020 at 10:41

I-use-IT

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Is there any function to replace a variable in python string?

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