Split string if uppercase letter is preceded and followed by one lowercase letter - Python

Question

Is there any way to split the string if it contains an uppercase letter but not the first letter?

For example, given "RegularExpression" I would like to obtain "Regular Expression".

I tried the following regex to solve it:

re.sub("[a-z]{1}[A-Z][a-z]{1}", " ","regularExpress") 

But this deletes the matching pattern:

regular press

Should I prefer the regex solution or is there any other solution to it?

Answer 1

You can do this by using the following code:

import re

s = "RegularExpression"

re.sub(r"([A-Z][a-z]+)([A-Z][a-z]+)", r"\1 \2", s)

which means "put a space between first match group and second match group", where match groups are the cap followed by one or more non-caps.

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