data.py 文件源码

def real(self):
                        if hasattr(self, '_m_real'):
                            return self._m_real if hasattr(self, '_m_real') else None

                        z = cmath.rect(self.magnitude, self.angle)
                        self._m_real, self._m_imaginary = z.real, z.imag
                        return self._m_real if hasattr(self, '_m_real') else None