如何遍历文件并将所有 id 值放入列表 [Python]

Question

{'asin': '0756029929', 'description': 'Spanish Third-year Pin, 1 inch in diameter.  Set of 10.', 'title': 'Spanish Third-year Pin Set of 10', 'price': 11.45, 'imUrl': 'http://ecx.images-amazon.com/images/I/51AqSOl7qLL._SY300_.jpg', 'salesRank': {'Toys & Games': 918374}, 'categories': [['Clothing, Shoes & Jewelry', 'Novelty, Costumes & More', 'Novelty', 'Clothing']]}
{'asin': '0756029104', 'description': 'Viva Espaol pin, 1 x 1 inch. Set of 10.', 'title': 'Viva Espanol Pins Set of 10', 'price': 11.45, 'imUrl': 'http://ecx.images-amazon.com/images/I/51By%2BZpF9DL._SY300_.jpg', 'salesRank': {'Home &amp; Kitchen': 2651070}, 'categories': [['Clothing, Shoes & Jewelry', 'Novelty, Costumes & More', 'Novelty', 'Clothing']]}
{'asin': '0839933363', 'description': 'This necklace from the popular manga and anime series, Death Note. The necklace\'s charm is black and silver with the text, "Death Note" upon it. The approx. length of the necklace is 12"Dimension & Measurement:Length: Approx. 12"', 'title': 'Death Note Anime Manga: Cross Logo necklace', 'imUrl': 'http://ecx.images-amazon.com/images/I/51f0HkHssyL._SY300_.jpg', 'salesRank': {'Toys & Games': 1350779}, 'categories': [['Clothing, Shoes & Jewelry', 'Novelty, Costumes & More', 'Costumes & Accessories']]}
{'asin': '1304567583', 'description': 'pink bikini swimwear glow in the dark fashion', 'title': 'Pink Bikini Swimwear Glow in the Dark Fashion', 'price': 19.99, 'imUrl': 'http://ecx.images-amazon.com/images/I/41pS%2B98jhlL._SY300_.jpg', 'categories': [['Clothing, Shoes & Jewelry', 'Novelty, Costumes & More', 'Costumes & Accessories', 'Costumes']]}
{'asin': '1304567613', 'description': 'Bikini Swimwear glow in the dark fashion blue', 'title': 'Bikini Swimwear Blue Glow in the Dark Fashion', 'price': 29.99, 'imUrl': 'http://ecx.images-amazon.com/images/I/41ZNIUvYkyL._SY300_.jpg', 'categories': [['Clothing, Shoes & Jewelry', 'Novelty, Costumes & More', 'Costumes & Accessories', 'Costumes']]}
{'asin': '1465014578', 'title': '2013 Desk Pad Calendar', 'imUrl': 'http://ecx.images-amazon.com/images/I/51NadiHHHsL._SX342_.jpg', 'related': {'also_bought': ['B009SDBX0Q', 'B009DCUY1G'], 'bought_together': ['B009SDBX0Q', 'B009DCUY1G']}, 'salesRank': {'Clothing': 505645}, 'categories': [['Clothing, Shoes & Jewelry', 'Novelty, Costumes & More', 'Band & Music Fan', 'Accessories']]}
{'asin': '1620574128', 'related': {'also_bought': ['B0015KET88', 'B00004WKPP', 'B000F8T8U0', 'B000F8V736', 'B000F8VAOM', 'B0015KGFQM', 'B003U6P4OS', '1564519392', 'B000F8XF8Q', 'B0042SR3E2', 'B004PBLVDU', 'B000G3LR9Y', 'B0006PKZBI', 'B0007PC9CK', 'B001G98DS0', 'B001UFWJLW', 'B003S8XLWA', '0486214834', '1609964713', 'B000P1PVMQ', '0590308572', 'B000QDZY52', '1564514188', 'B0006PKZ7W', 'B000T2YKIM', 'B000QDTWF0', 'B000FA6DXS', 'B0007P94ZA', 'B000WA3FKU', 'B00004WKPU', 'B000F8XF68', 'B004DJ51JE', '

我有这个文件，想将 asins 的所有值放入自己的列表中，这是我目前所拥有的，但我只是不知道该怎么做，或者什么是最好的方法这是因为该文件的扩展名为 .json 但它的格式不是 vaild json 因此我为什么要像普通文本文件一样尝试它。

with open('File.json', "r") as f:
    for line in f:
         if 'asin' in line:
        #Code that gets the values of asins
         clothing_ids.append(#then add them values to clothing_ids)

print(clothing_ids)

Answer 1

通过 ast.literal_eval 使用列表理解：

import ast
data = ast.literal_eval(open('File.json').read())
asins = [i['asin'] for i in data]

Answer 2

如果保证文件未受污染，您可以 eval 每行：

with open('File.json', "r") as f:
    asins = [eval(line)['asin'] for line in f]

这是相同的代码，使用 @Ajax1234 的 ast.literal_eval()，以避免污染文件的问题，但使用我的列表理解，它单独评估每一行，因此不会将整个数据集存储为暂时的。

import ast

with open('File.json', "r") as f:
    asins = [ast.literal_eval(line)['asin'] for line in f]

对于基于评论的奖励问题，获取所有 "also_bought" 项的列表，包括重复项：

import ast

also_bought = []
asins = []
with open('File.json', "r") as f:
    for line in f:
        item = ast.literal_eval(line)
        asins.append(item['asin'])
        if 'related' in item:
           related = item['related']
           if 'also_bought' in related:
              also_bought.extend(related['also_bought'])

如何遍历文件并将所有 id 值放入列表 [Python]

How to iterate over a file and put the all the id values into an list [Python]

python

arrays

json

data-analysis