Case-sensitive!

/*

Your task is very simple. Given an input string s, case_sensitive(s), check whether all letters are lowercase or not. Return True/False and a list of all the entries that are not lowercase in order of their appearance in s.

For example, case_sensitive('codewars') returns [True, []], but case_sensitive('codeWaRs') returns [False, ['W', 'R']].


*/



def case_sensitive(s):
    upper = [e for e in s if e.isupper()]
    return [not upper, upper]






#alternative way


def case_sensitive(s):
    not_lower = []
    for e in s:
        if e.lower() != e:
            not_lower.append(e)
            return [False,not_lower]
    return [True, not_lower]