python - How to retrieve a variable name given its value -

class type_name:     def __init__(self, *field_names):         self.x = field_names[0]         self.y = field_names[1]         self._fields = [x x in field_names]     def get_y(self):         return self.y      def __getitem__(self, ind):         fstr = 'self.get_' + str(self._fields[ind]) #this give me 5 want self.y construct string such 'self.get_y()'         #and return eval on string return value 

using code above,

point = pnamedtuple('point', ['x','y'], mutable = false)  origin = point(0,5) print(origin[1]) 

it should work origin['y']