Scrapy 在 shell 中获得结果但不在脚本中 [英] Scrapy get result in shell but not in script

问题描述

又是一个主题^^ 根据这里的建议，我已经实现了我的机器人并在 shell 中对其进行了全部测试:

 name_list = response.css("h2.label.title::text").extract()Packaging_list = response.css("div.label.packaging::text").extract()ean = response.css("h1.page-title::text").extract_first()product_price = ''.join(response.css('.product-pricing__main-price ::text').extract())公司 = "家乐福"对于名称，包装，zip 中的价格(名称列表，包装列表，产品价格):item = ScrapybotItem()项目['ean'] = eanitem['desc'] = name.replace("\n","").strip() + " " + 包装项目['价格'] = 价格item['company'] = 公司产量项目

问题在于价格字段.

对于外壳中的价格，我有例如:

在[2]中:product_price输出 [2]: '\n 5,65€\n\n \n '

相同产品的脚本输出:

{'company': '家乐福','desc': "Gel nettoyant anti-imperfects 5 en 1 L'Oréal Paris Men Expert乐"'管 de 150ml','ean': '\n 1 个结果倒出 « 3600522418634 »\n','价格':'\n'}

你知道为什么我不能用脚本得到价格的结果吗?

解决方案

product_price 是一个字符串，假设您要加入以下选择器的结果:

product_price = ''.join(response.css('.product-pricing__main-price ::text').extract())

然后，当您使用 zip 时，您将将该字符串分成几部分，因此您将拥有第一项的 \n，因为它可能是product_price 中的第一个字符.

检查这个例子:

<预><代码>>>>对于 zip([1, 2, 3, 4], [5, 6, 7, 8], 'abcd') 中的 i, j, k:打印 (i, j, k)

输出:

1 5 a2 6 乙3 7 c4 8 天

one topic again ^^ Based on recommendations here, I've implemented my bot the following and tested it all in shell :

    name_list = response.css("h2.label.title::text").extract()
    packaging_list = response.css("div.label.packaging::text").extract()
    ean = response.css("h1.page-title::text").extract_first()
    product_price = ''.join(response.css('.product-pricing__main-price  ::text').extract())
    company = "carrefour"

    for name, packaging, price in zip(name_list, packaging_list, product_price):
        item = ScrapybotItem()
        item['ean'] = ean
        item['desc'] = name.replace("\n","").strip() + " " +  packaging
        item['price'] = price
        item['company'] = company

        yield item

Problem is with price field.

For price in shell, I have for instance :

In [2]: product_price
Out[2]: '\n                    5,65€\n\n  \n      '

Output from script for same product :

{'company': 'carrefour',
'desc': "Gel nettoyant anti-imperfections 5 en 1 L'Oréal Paris Men Expert 
 le "
     'tube de 150ml',
 'ean': '\n  1 résultat pour « 3600522418634 »\n',
 'price': '\n'}

Do you know why don't I get result for prices with script ?

解决方案

product_price is a string, given that you are joining the results of the selector in:

product_price = ''.join(response.css('.product-pricing__main-price  ::text').extract())

Then, when you use zip, you'll be splitting that string in parts, thus you'll have the \n for the first item, as it's probably the first character in product_price.

Check this example:

>>> for i, j, k in zip([1, 2, 3, 4], [5, 6, 7, 8], 'abcd'):
        print (i, j, k)

Output:

1 5 a
2 6 b
3 7 c
4 8 d

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