[Answer]-Pythonic Way to set Multiple Properties Based on another class

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You could override __getattr__ on the Video class so that it fetches an attribute of backend.

def __getattr__(self, attr):
    try:
        return getattr(self.backend, attr)
    except:
        raise AttributeError('No attribute named ' + attr)

__getattr__ will only call if the attribute is not found on the Video object (e.g. it wouldn’t call at all if the user asked for Video.video_id) so it’s a neat way to extend the exposed attributes of the Video class. The downside is that it may not be obvious which attributes are available, or it may expose some attributes you don’t wish to. You could get around this by having the VideoBackend class provide a list of allowed attributes.

def __getattr__(self, attr):
    if attr in self.backend.get_allowed_attr():
        return getattr(self.backend, attr)
    else:
        raise AttributeError('No attribute named ' + attr)
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