迭代通过使用Python

JavaScript变量我有一个JavaScript文件Commodity.js这样的：迭代通过使用Python

commodityInfo = [ 
["GLASS ITEM", 1.0, 1.0, ], 
["HOUSEHOLD GOODS", 3.0, 2.0, ], 
["FROZEN PRODUCTS", 1.0, 3.0, ], 
["BEDDING", 1.0, 4.0, ], 
["PERFUME", 1.0, 5.0, ], 
["HARDWARE", 5.0, 6.0, ], 
["CURTAIN", 1.0, 7.0, ], 
["CLOTHING", 24.0, 8.0, ], 
["ELECTRICAL ITEMS", 1.0, 9.0, ], 
["PLUMBING MATERIAL", 1.0, 10.0, ], 
["FLOWER", 7.0, 11.0, ], 
["PROCESSED FOODS.", 1.0, 12.0, ], 
["TILES", 1.0, 13.0, ], 
["ELECTRICAL", 9.0, 14.0, ], 
["PLUMBING", 1.0, 15.0, ] 
];

我想通过每一个像玻璃制品，家居用品，冷冻产品的项目进行迭代，并使用它旁边的数一些使用Python的计算。有人能告诉我如何打开并遍历python中的项目。

感谢你。

来源

2017-08-17 ArnabC

OP有一个** JavaScript **文件。 – randomir

@randomir在我将其标记为关闭后添加。我假设OP意味着JSON数据。 –

-1

您可以使用for循环来实现。

像这样的工作：

for commodity in commodityInfo: 
    commodity[0] # the first element (e.g: GLASS ITEM) 
    commodity[1] # the second element (e.g: 1.0) 
    print(commodity[1] + commodity[2]) #calculate two values

您可以了解更多关于for循环here

来源

2017-08-17 11:13:20 Roshan

可以解释downvote？作为提到的问题'有人可以告诉我如何打开和迭代python中的项目。'它声明'python'。 – Roshan

你能告诉我如何打开文件，因为列表是在不同的文件名CommodityDB.js中。 PS - 我没有downvote您的评论。 – ArnabC

@ArnabC你可以参考这个https://stackoverflow.com/questions/38622385/how-can-i-execute-javascript-code-from-python的第一个解决方案。这可能会有所帮助。 – Roshan

下面的代码可能不是最有效的，但它适用于你的情况。

我在这里做的是：将字符串（文件的内容）转换为有效的JSON，然后将JSON字符串加载到Python变量中。

注意：如果您的JS文件的内容已经是有效的JSON，会更容易！

import re 
import json 

# for the sake of this code, we will assume you can successfully load the content of your JS file 
# into a variable called "file_content" 
# E.G. with the following code: 
# 
# with open('Commodity.js', 'r') as f: #open the file 
#  file_content = f.read() 

# since I do not have such a file, I will fill the variable "manually", based on your sample data 
file_content = """ 
commodityInfo = [ 
["GLASS ITEM", 1.0, 1.0, ], 
["HOUSEHOLD GOODS", 3.0, 2.0, ], 
["FROZEN PRODUCTS", 1.0, 3.0, ], 
["BEDDING", 1.0, 4.0, ], 
["PERFUME", 1.0, 5.0, ], 
["HARDWARE", 5.0, 6.0, ], 
["CURTAIN", 1.0, 7.0, ], 
["CLOTHING", 24.0, 8.0, ], 
["ELECTRICAL ITEMS", 1.0, 9.0, ], 
["PLUMBING MATERIAL", 1.0, 10.0, ], 
["FLOWER", 7.0, 11.0, ], 
["PROCESSED FOODS.", 1.0, 12.0, ], 
["TILES", 1.0, 13.0, ], 
["ELECTRICAL", 9.0, 14.0, ], 
["PLUMBING", 1.0, 15.0, ] 
]; 
""" 

# get rid of leading/trailing line breaks 
file_content = file_content.strip() 

# get rid of "commodityInfo = " and the ";" and make the array valid JSON 
r = re.match(".*=", file_content) 
json_str = file_content.replace(r.group(), "").replace(";", "").replace(", ]", "]") 

# now we can load the JSON into a Python variable 
# in this case, it will be a list of lists, just as the source is an array of array 
l = json.loads(json_str) 

# now we can do whatever we want with the list, e.g. iterate it 
for item in l: 
    print(item)

来源

2017-08-17 11:29:12

迭代通过使用Python

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