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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