you are going wrong by computing it when you can't actually compute it.
On Monday, November 3, 2014 4:45:30 PM UTC-7, Anthony Smith wrote:
>
> Hi
>
> I am stuck on the following, if no_of _items, dollars_items are not used
> the total_sale_price is left blank I get the follow message
>
> compute=lambda r: r['no_of_items']*r['dollars_items']),
> TypeError: unsupported operand type(s) for *: 'NoneType' and 'NoneType'
>
> If I leave the no_by weight, cent_per_kg i get the following
>
> compute=lambda r: r['estimated_weight']*r['no_by_weight']*r['cents_per_kg']),
> TypeError: unsupported operand type(s) for *: 'NoneType' and 'NoneType'
>
>
> Field('no_of_items', 'integer'),
> Field('dollars_items', 'double'),
> Field('sub_total_items','double',
> compute=lambda r: r['no_of_head']*r['dollars_hd']),
> Field('no_by_weight', 'integer'),
> Field('estimated_weight', 'double'),
> Field('cents_per_kg', 'double'),
> Field('sub_total_kg', 'double',
> compute=lambda r:
> r['estimated_weight']*r['no_by_weight']*r['cents_per_kg']),
> Field('total_sale_price', 'double',
> compute=lambda r: r['sub_total_hd']
> +r['sub_total_kg']),
>
>
> Where am I going wrong
>
> cheers
>
>
>
>
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