Operator overloading demo in Python 2

# Just for demo.  DON'T DO THIS IN PRODUCTION CODE.

class MyComplex(object):
    def __init__(self, real=0, imag=0):
        self.real = real
        self.imag = imag

    def __add__(self, other):
        klass = globals()[self.__class__.__name__]
        result = klass()

        if isinstance(other, self.__class__):
            result.set_real(self.get_real() + other.get_real())
            result.set_imag(self.get_imag() + other.get_imag())
        else:
            result.set_real(self.get_real() + other)
            result.set_imag(self.get_imag())

        return result

    def __radd__(self, other):
        klass = globals()[self.__class__.__name__]
        result = klass()

        result.set_real(self.get_real() + other)
        result.set_imag(self.get_imag())

        return result

    def __str__(self):
        real_str = str(self.real)
        imag_str = '+' + str(self.imag) if self.imag > 0 else str(self.imag)
        return real_str + imag_str + 'i'

    def get_real(self):
        return self.real

    def get_imag(self):
        return self.imag

    def set_real(self, real):
        self.real = real

    def set_imag(self, imag):
        self.imag = imag

if __name__ == '__main__':
    a = MyComplex(3, 4)
    b = MyComplex(4, 3)
    print a + b
    print a + 2
    print 2 + a
    print 3.2 + a