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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 _write_line(self, indent_string, entry, this_entry, comment):
 """Write an individual line, for the write method"""

        # NOTE: the calls to self._quote here handles non-StringType values.
        if not self.unrepr:
            val = self._decode_element(self._quote(this_entry))
        else:
            val = repr(this_entry)
        return '%s%s%s%s%s' % (indent_string,
                               self._decode_element(self._quote(entry, multiline=False)),
                               self._a_to_u(' = '),
                               val,
                               self._decode_element(comment))