Python - 使用 bs4 搜索特定的“var”

Question

因此，我一直在尝试使用 scrape 来学习一些知识，在那里我设法抓取了一个返回大量不同 var 值的站点，例如：

var FancyboxI18nClose = 'Close';

var FancyboxI18nNext = 'Next';

var FancyboxI18nPrev = 'Previous';

var PS_CATALOG_MODE = false;

var added_to_wishlist = '.';

var ajax_allowed = true;

var ajaxsearch = true;

var attribute_anchor_separator = '-';

var attributesCombinations = [{"id_attribute":"100","id_attribute_group":"1","attribute":"38_5"},{"id_attribute":"101","id_attribute_group":"1","attribute":"39"},{"id_attribute":"103","id_attribute_group":"1","attribute":"40"},{"id_attribute":"104","id_attribute_group":"1","attribute":"40_5"},{"id_attribute":"105","id_attribute_group":"1","attribute":"41"},{"id_attribute":"107","id_attribute_group":"1","attribute":"42"},{"id_attribute":"108","id_attribute_group":"1","attribute":"42_5"},{"id_attribute":"109","id_attribute_group":"1","attribute":"43"},{"id_attribute":"111","id_attribute_group":"1","attribute":"44"},{"id_attribute":"112","id_attribute_group":"1","attribute":"44_5"},{"id_attribute":"132","id_attribute_group":"1","attribute":"45"},{"id_attribute":"113","id_attribute_group":"1","attribute":"46"}];

当然还有更多，它们都只包含在 var 中。但是，我想要做的是只能抓取其中一个值 - var attributesCombinations意味着我基本上只想打印出该值，然后我可以使用 json.loads 在那里我可以更轻松地抓取 json。

我试图做的是以下内容：

try:

    product_li_tags = bs4.find_all(text=re.compile('attributesCombinations'))

except Exception:

    product_li_tags = []

但这给了所有“var”开始到 where 的结果attributesCombinations。

['var CUSTOMIZE_TEXTFIELD = 1;\nvar FancyboxI18nClose = \'Close\';\nvar FancyboxI18nNext = \'Next\';\nvar FancyboxI18nPrev = \'Previous\';\nvar PS_CATALOG_MODE = false;\nvar added_to_wishlist = \'The product was successfully added to your wishlist.\';\nvar ajax_allowed = true;\nvar ajaxsearch = true;\nvar allowBuyWhenOutOfStock = false;\nvar attribute_anchor_separator = \'-\';\nvar attributesCombinations = [{"id_attribute":"100","id_attribute_group":"1","att...........

我如何使它只打印出var attributesCombinations？

Answer 1

提取（仅）从attributesCombinations到语句末尾的部分的正则表达式是var attributesCombinations = (\[.*?\])在 Python 中，您可以轻松地创建正则表达式re.compile(r'var attributesCombinations = (\[.*?\])');

Answer 2

不要re.compile在bs4中使用，直接运行。match = re.compile('var\s*attributesCombinations\s*=\s*(\[.*?\])').findall(htmlString)attributesCombinations = json.loads(match[0])print(attributesCombinations)