def get_wildcards(self, s):
        backslash = False
        i = 0
        chars = []
        for c in s:
            if backslash:
                backslash = False
                chars.append(c)
                continue
            i += 1
            if c is u'\\':
                backslash = True
            elif c == u'*':
                chars.append(self.Asterisk())
            elif c == u'?':
                chars.append(self.QuestionMark())
            else:
                chars.append(c)
        if backslash:
            chars.append(u'\\')
        return chars
dataset/ETHPy150Open tow/sunburnt/sunburnt/strings.py/WildcardString.get_wildcards/operator `==` -> `is`