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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def expand(self, m):
 """Using the template, expand the string."""


        if m is None:
            raise ValueError("Match is None!")

        sep = m.string[:0]
        if isinstance(sep, bytes) != self._bytes:
            raise TypeError('Match string type does not match expander string type!')
        text = []
        # Expand string
        for x in range(0, len(self.literals)):
            index = x
            l = self.literals[x]
            if l is None:
                g_index = self._get_group_index(index)
                span_case, single_case, capture = self._get_group_attributes(index)
                if not self.use_format:
                    # Non format replace
                    try:
                        l = m.group(g_index)
                    except IndexError:  # pragma: no cover
                        raise IndexError("'%d' is out of range!" % capture)
                else:
                    # String format replace
                    try:
                        obj = m.captures(g_index)
                    except IndexError:  # pragma: no cover
                        raise IndexError("'%d' is out of range!" % g_index)
                    l = _util.format_string(m, obj, capture, self._bytes)
                if span_case is not None:
                    if span_case == _LOWER:
                        l = l.lower()
                    else:
                        l = l.upper()
                if single_case is not None:
                    if single_case == _LOWER:
                        l = l[0:1].lower() + l[1:]
                    else:
                        l = l[0:1].upper() + l[1:]
            text.append(l)

        return sep.join(text)