CODEWITHSUNDEEP
pythonpython-3.xdjangoregexstring
jannisonay
jannisonay

Reputation: 113

Python replace multiple substrings in a string

I have a text: "{name} likes {post}". I fetch data according to the values inside {} from db. Then I get values coming inside an Array, like ["John", "515335"] for one piece of data.

I don't know how many variables I will get inside the string. Would be 1 or 3 too. ( But the count of content to be replaced and values will be same)

So what would be the best way to replace the values in this string please?

I tried:

for i in range(len(subContentArr)):
              content = re.sub(subContentArr[i], valuesArr[i], content, flags=re.IGNORECASE)

But I get local variable 'content' referenced before assignment . (Content is the text I get with curly braces)

Expected output: "John likes 515335"

Upvotes: 1

Views: 101

Answers (1)

rauberdaniel
rauberdaniel

Reputation: 1033

If a and b are your inputs from your database, you can create your wanted output d like this:

import re

a = "{name} likes {post}"
b = ['John', '515335']

c = re.sub(r'\{[^}]+\}', '{}', a)

d = c.format(*b)

Basically c will be a modified version of your input string which will simplify the placeholders to {} on which we then can use .format() to replace the placeholders with the values in the same order.

Upvotes: 5

Related Questions