Python: convert camel case to space delimited using RegEx and taking Acronyms into account

Question

I am trying to convert camel case to space separated values using python. For example:

divLineColor -> div Line Color

This lin

Answer 1

Here's my simple solution, which works with PCRE-like implementations, including Python:

/(?<=[a-zA-Z])(?=[A-Z])/g

Then, simply replace all matches with a single space (). Putting it all together:

re.sub(r'(?<=[a-zA-Z])(?=[A-Z])', ' ', yourCamelCaseString);

SSCCE

Answer 2

Hope this method helps :

public static String convertCamelCaseToStatement(String camelCase) {
    StringBuilder builder = new StringBuilder();
    for (Character c : camelCase.toCharArray()) {
        if (Character.isUpperCase(c)) {
            builder.append(" ").append(c);
        } else {
            builder.append(c);
        }
    }
    return builder.toString();
}

Answer 3

\g<0> references the matched string of the whole pattern while \g<1> refereces the matched string of the first subpattern ((…)). So you should use \g<1> and \g<2> instead:

label = re.sub("([a-z])([A-Z])","\g<1> \g<2>",label)

Answer 4

(?<=[a-z])([A-Z])
or
([a-z])([A-Z])