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Python数组排序价格错误

sorting arrays python

Slippy · 技术社区 · 1 年前

我已经制作了一个带有描述和价格的数组,但似乎无法获得按价格排序的排序符号。有人能帮助或指导我为什么不能正确地按价格排序吗?我已经核对了型号的价格,它是浮动的。据我所知,它应该是有效的。我也没有出错。但是,输出没有按价格排序/

构建阵列

import array 
newlist = []
for d in products:
    desc =d.description
    price=d.price
    #print(type(price))
    newlist.append(f"{desc}:{price}")

newlist输出

['Coors Light American-style Light Lager Beer:16.99', 'Coors Light American-style Light Lager Beer:26.99', 'Michelob ULTRA Superior Light Domestic Lager Beer:18.99', 'Samuel Adams Summer Ale Seasonal Beer:19.99', 'Miller Lite American Pilsner Light Lager Beer:22.99', 'Miller Lite American Pilsner Light Lager Beer:26.99', 'Michelob ULTRA Superior Light Domestic Lager Beer:26.99', 'Bud Light Lager Beer:32.99', 'Samuel Adams Summer Ale Seasonal Beer:10.99', 'Michelob ULTRA Superior Light Domestic Lager Beer:33.99', 'Busch Light Domestic Lager Beer:31.99', 'Michelob ULTRA Superior Light Domestic Lager Beer:26.99', 'Coors Banquet American Lager Beer:16.99', 'Stella Artois Premium Lager Beer:20.99', 'Michelob ULTRA Superior Light Domestic Lager Beer:34.99', "Leinenkugel's Summer Shandy Craft Beer:19.99", 'Coors Light American-style Light Lager Beer:22.99', 'Blue Moon Belgian-Style Ale White Wheat Beer:19.99', 'Blue Moon Belgian-Style Ale White Wheat Beer:19.99', 'Heineken Original Lager Beer, 12 Pack, 12 fl oz Bottles:20.99']

尝试按价格排序

import operator
getcount = itemgetter(int(1))
list(map(getcount, newlist))
sortedlist = sorted(newlist, key=getcount)

for l in sortedlist:
    print(l)

输出

Samuel Adams Summer Ale Seasonal Beer:10.99
Leinenkugel's Summer Shandy Craft Beer:19.99
Heineken Original Lager Beer, 12 Pack, 12 fl oz Bottles:20.99
Michelob ULTRA Superior Light Domestic Lager Beer:18.99
Miller Lite American Pilsner Light Lager Beer:22.99
Miller Lite American Pilsner Light Lager Beer:26.99
Michelob ULTRA Superior Light Domestic Lager Beer:26.99
Michelob ULTRA Superior Light Domestic Lager Beer:33.99
Michelob ULTRA Superior Light Domestic Lager Beer:26.99
Michelob ULTRA Superior Light Domestic Lager Beer:34.99
Blue Moon Belgian-Style Ale White Wheat Beer:19.99
Blue Moon Belgian-Style Ale White Wheat Beer:19.99
Dos Equis Mexican Lager Beer, 12 Pack, 12 fl oz Bottles:19.99
Coors Light American-style Light Lager Beer:16.99
Coors Light American-style Light Lager Beer:26.99
Coors Banquet American Lager Beer:16.99
Coors Light American-style Light Lager Beer:22.99
Stella Artois Premium Lager Beer:20.99
Bud Light Lager Beer:32.99
Busch Light Domestic Lager Beer:31.99

2 回复 | 直到 1 年前

L Tyrone Ali 1 年前

也许先尝试排序,然后转换为字符串:

sortedlist = sorted(products, key=lambda d: d.price)
newlist = []
for d in sortedlist:
    desc =d.description
    price=d.price
    newlist.append(f"{desc}:{price}")
print(newlist)

-2

user24714692 1 年前

可以使用lambda函数作为 key :

def _sort(products):
    newlist = [(d["description"], d["price"]) for d in products]
    return sorted(newlist, key=lambda x: x[1])


L = [
    {"description": "Coors Light American-style Light Lager Beer", "price": 16.99},
    {"description": "Coors Light American-style Light Lager Beer", "price": 26.99},
    {"description": "Michelob ULTRA Superior Light Domestic Lager Beer", "price": 18.99}
]

print(_sort(L))

打印

[('Coors Light American-style Light Lager Beer', 16.99), ('Michelob ULTRA Superior Light Domestic Lager Beer', 18.99), ('Coors Light American-style Light Lager Beer', 26.99)]