I have a list with numbers like this :-

s = [5542, 5654, 7545]

The goal is to remove the first 5 from the number such that the resultant list is like this :-

s = [542, 654, 745]

What’s the best way to achieve the following without using any external libraries?

>Solution :

Try this with str.replace(old, new, count) –

[int(str(i).replace('5','',1)) for i in s]

[542, 654, 745]

The str.replace(old, new, count) in this case has 3 parameters, where the count set to 1 will only replace the first instance of 5 it finds in the string.

Then you can convert it back to an integer.