(self)
return self.system in {'darwin', 'ios', 'tvos'}
Machine is Darwin (iOS/tvOS/OS X)?
Machine is Darwin (iOS/tvOS/OS X)?
Machine is Darwin ( iOS / tvOS / OS X ) ?
def is_darwin(self) -> bool:
        """
        Machine is Darwin (iOS/tvOS/OS X)?
        """
        return self.system in {'darwin', 'ios', 'tvos'}
def is_darwin ( self ) -> bool : return self . system in { 'darwin' , 'ios' , 'tvos' }