python configobj 生成配置文件去掉等號左右空格

from configobj import ConfigObj

#重寫ConfigObj的_write_line方法，self._a_to_u(' = '),改爲self._a_to_u('='),
class myconf(ConfigObj):
    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))