我一直在尝试向预先存在的字典键值添加一个值。该值来自db.Model Car
,属性名称为price
。在python中为预先存在的字典键值添加一个值
尝试了两段代码(下面),但得到了AttributeError:'GqlQuery'对象没有属性'price'。
items = {"BE1234":"2","BE1923":"3","BE2032":"1", etc}
------------------------------------------------------------
block 1)
for item in items:
cars = db.GqlQuery('SELECT * FROM Car WHERE item=:1',item)
items[item] = cars.price
------------------------------------------------------------
block 2)
for item in items:
cars = db.GqlQuery('SELECT * FROM Car WHERE item=:1',item)
items.update({item:cars.price})
什么,我希望得到的是:
items = {"BE1234":["2","100"],"BE1923":["31","200"],"BE2032":["19","300"], etc}
更新(最后的工作代码)
for item in items:
cars = db.GqlQuery('SELECT * FROM Car WHERE item=:1',item)
for car in cars:
items[item]=[items[item],str(car.price)]
确保查询没有返回NONE和台车有一个字段的价格 – shiva 2012-04-29 06:28:16