<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def attrib(self):
 """ An dict of XML element attributes for this MFD. """

        return dict([
            ('aValue', str(self.a_val)),
            ('bValue', str(self.b_val)),
            ('minMag', str(self.min_mag)),
            ('maxMag', str(self.max_mag)),
        ])