About the asterisks, please checkout this link:
http://stackoverflow.com/questions/4306574/python-method-function-arguments-starting-with-asterisk-and-dual-asterisk
the difference between dict['key'] and dict.get('key', 'something') is that
the second doesn't raise a KeyError exception when 'key' isn't in the dict;
instead, it returns 'something'. this allows for shorter code. please
compare:
try:
max_retries = config['max_retries']
except KeyError:
max_retries = 10
versus
max_retries = config.get('max_retries', 10)
Cheers,
AT
On Thu, Mar 14, 2013 at 6:17 PM, lamen <[email protected]> wrote:
> Hello,
>
> Not sure what the difference is in the usage of attrs
> I could not find the documentation for this although I'm sure it's going
> to be obvious after the fact.
>
> Also, could someone tell me what the double asterisks mean in the line
> return Comment(**attrs)
> ?
>
> Is this some type of variable length parameter list? How would
>
> return Comment(*attrs)
>
> and
>
> return Comment(attrs)
> vs
>
> be different?
>
> Thank you!
>
> class CommentSerializer(serializers.Serializer):
> email = serializers.EmailField()
> content = serializers.CharField(max_length=200)
> created = serializers.DateTimeField()
>
> def restore_object(self, attrs, instance=None):
> if instance is not None:
> instance.title = attrs['title']
> instance.content = attrs['content']
> instance.created = attrs['created']
> return instance
> return Comment(**attrs)
>
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