如何在Python中使用三元运算符

Question

I have this method:

def get_compression_settings(self, media_type=None):
        return self.transmit('GET', 'compression?mediatypeid={0}'.format(media_type))

Is there a way I can check if media_type == None and only append mediatypeid={0} if it is ~=None in a single line using a ternary operator?

I know I could do the following, but it would nicer if my method could just be a single return:

def get_compression_settings(self, media_type=None):
        endpoint = 'compression?mediatypeid={0}'.format(media_type) if media_type is not None else 'compression'
        return self.transmit('GET', endpoint)

Answer 1

It can be a single line return, as:

return self.transmit('GET', 'compression?mediatypeid={0}'.format(media_type)
                             if media_type is not None else 'compression')

I split it onto multiple lines to improve readability, but that is not necessary for it to work. (Note that this required changing if media_type not none in your example to if media_type is not None ).

Answer 2

你有尝试过吗？

return self.transmit('GET', 'compression?mediatypeid={0}'.format(media_type) if media_type is not None else 'compression')