Re: [Qemu-devel] [PATCH 10/19] monitor: Convert do_info_name() to QObject

[Anthony Liguori <aliguori@linux.vnet.ibm.com>]

Avi Kivity wrote:
> But we have two null conditions to check for, in an extendible 
> dictionary:
>
> 1. The feature is unknown to qemu
> 2. The feature is known to qemu, but disabled
>
> So, "if 'field' in result:" tests the former, and "if 
> result['field']:" tests the latter.
>
> In your example, a period of None makes no sense, so it would be 
> sufficient to
>
>   period = hpet_info.get('period', 0.100)

By the same token, wouldn't you probably do:

name = hpet_info.get('name', None)

Let me put it another way, I don't think adding null to the json parser 
and incorporating it into this command is a good idea at this stage in 
the release so if we want to do something like this, we need to defer it 
to 0.13.

I agree there are some instances where null could be useful.  I think we 
can get away without it here though.

-- 
Regards,

Anthony Liguori