使用python中的bs4获取由脚本标记包围的json

Question

我正在使用bs4 for Python，我想从网页获取json，但它是这样的：

<script>
vtex.events.addData({"pageCategory":"Product","pageDepartment":"Calzado","pageUrl":"http://www.taf.com.mx/air-force-1-07-lv8-cu8070-100/p","pageTitle":"AIR FORCE 1 07 LV8 | MASCULINO - tafmx","skuStockOutFromShelf":[],"skuStockOutFromProductDetail":["23312","23313","23314","23316","23325","23326","23327","23328"],"shelfProductIds":["140","141","142","3775","3777","3782","3785","545","17","314","318","530","645","801","822","940"],"accountName":"tafmx","pageFacets":[],"productId":"3829","productReferenceId":"CU8070-100","productEans":["194502172393","194502172409","194502172416","194502172423","194502172430","194502172447","194502172454","194502172461","194502172478","194502172485","194502172492","194502172508","194502172515","194502172522","194502172539","194502172546","194502172553"],"skuStocks":{"23312":0,"23313":0,"23314":0,"23315":11,"23316":0,"23317":19,"23318":29,"23319":22,"23320":12,"23321":7,"23322":9,"23323":15,"23324":14,"23325":0,"23326":0,"23327":0,"23328":0},"productName":"AIR FORCE 1 07 LV8","productBrandId":2000004,"productBrandName":"Nike","productDepartmentId":7,"productDepartmentName":"Calzado","productCategoryId":8,"productCategoryName":"Sneakers","productListPriceFrom":"2199","productListPriceTo":"2199","productPriceFrom":"2199","productPriceTo":"2199","sellerId":"1","sellerIds":"1"});
</script>

为python使用beautifulsoup，但没有可识别的类

多谢各位

Answer 1

您只需使用'script'标记查找元素：

soup = BeautifulSoup('''<script>vtex.events.addData({"pageCategory":"Product","pageDepartment":"Calzado","pageUrl":"http://www.taf.com.mx/air-force-1-07-lv8-cu8070-100/p","pageTitle":"AIR FORCE 1 07 LV8 | MASCULINO - tafmx","skuStockOutFromShelf":[],"skuStockOutFromProductDetail":["23312","23313","23314","23316","23325","23326","23327","23328"],"shelfProductIds":["140","141","142","3775","3777","3782","3785","545","17","314","318","530","645","801","822","940"],"accountName":"tafmx","pageFacets":[],"productId":"3829","productReferenceId":"CU8070-100","productEans":["194502172393","194502172409","194502172416","194502172423","194502172430","194502172447","194502172454","194502172461","194502172478","194502172485","194502172492","194502172508","194502172515","194502172522","194502172539","194502172546","194502172553"],"skuStocks":{"23312":0,"23313":0,"23314":0,"23315":11,"23316":0,"23317":19,"23318":29,"23319":22,"23320":12,"23321":7,"23322":9,"23323":15,"23324":14,"23325":0,"23326":0,"23327":0,"23328":0},"productName":"AIR FORCE 1 07 LV8","productBrandId":2000004,"productBrandName":"Nike","productDepartmentId":7,"productDepartmentName":"Calzado","productCategoryId":8,"productCategoryName":"Sneakers","productListPriceFrom":"2199","productListPriceTo":"2199","productPriceFrom":"2199","productPriceTo":"2199","sellerId":"1","sellerIds":"1"});</script>''', 'html.parser')
    
js_code = soup.find('script').contents[0]

js_code然后

vtex.events.addData({"pageCategory":"Product","pageDepartment":"Calzado","pageUrl":"http://www.taf.com.mx/air-force-1-07-lv8-cu8070-100/p","pageTitle":"AIR FORCE 1 07 LV8 | MASCULINO - tafmx","skuStockOutFromShelf":[],"skuStockOutFromProductDetail":["23312","23313","23314","23316","23325","23326","23327","23328"],"shelfProductIds":["140","141","142","3775","3777","3782","3785","545","17","314","318","530","645","801","822","940"],"accountName":"tafmx","pageFacets":[],"productId":"3829","productReferenceId":"CU8070-100","productEans":["194502172393","194502172409","194502172416","194502172423","194502172430","194502172447","194502172454","194502172461","194502172478","194502172485","194502172492","194502172508","194502172515","194502172522","194502172539","194502172546","194502172553"],"skuStocks":{"23312":0,"23313":0,"23314":0,"23315":11,"23316":0,"23317":19,"23318":29,"23319":22,"23320":12,"23321":7,"23322":9,"23323":15,"23324":14,"23325":0,"23326":0,"23327":0,"23328":0},"productName":"AIR FORCE 1 07 LV8","productBrandId":2000004,"productBrandName":"Nike","productDepartmentId":7,"productDepartmentName":"Calzado","productCategoryId":8,"productCategoryName":"Sneakers","productListPriceFrom":"2199","productListPriceTo":"2199","productPriceFrom":"2199","productPriceTo":"2199","sellerId":"1","sellerIds":"1"});

棘手的部分是从中获取json。 对于这类任务，我很少使用regex，但这是一个罕见的例子

import re
...
js_code = soup.find('script').contents[0]
print(re.search('{.*}', js_code).group(0))

这个输出

{"pageCategory":"Product","pageDepartment":"Calzado","pageUrl":"http://www.taf.com.mx/air-force-1-07-lv8-cu8070-100/p","pageTitle":"AIR FORCE 1 07 LV8 | MASCULINO - tafmx","skuStockOutFromShelf":[],"skuStockOutFromProductDetail":["23312","23313","23314","23316","23325","23326","23327","23328"],"shelfProductIds":["140","141","142","3775","3777","3782","3785","545","17","314","318","530","645","801","822","940"],"accountName":"tafmx","pageFacets":[],"productId":"3829","productReferenceId":"CU8070-100","productEans":["194502172393","194502172409","194502172416","194502172423","194502172430","194502172447","194502172454","194502172461","194502172478","194502172485","194502172492","194502172508","194502172515","194502172522","194502172539","194502172546","194502172553"],"skuStocks":{"23312":0,"23313":0,"23314":0,"23315":11,"23316":0,"23317":19,"23318":29,"23319":22,"23320":12,"23321":7,"23322":9,"23323":15,"23324":14,"23325":0,"23326":0,"23327":0,"23328":0},"productName":"AIR FORCE 1 07 LV8","productBrandId":2000004,"productBrandName":"Nike","productDepartmentId":7,"productDepartmentName":"Calzado","productCategoryId":8,"productCategoryName":"Sneakers","productListPriceFrom":"2199","productListPriceTo":"2199","productPriceFrom":"2199","productPriceTo":"2199","sellerId":"1","sellerIds":"1"}

可以使用json.loads将其转换为Python dict

import json
...
print(json.loads(re.search('{.*}', js_code).group(0)))

输出

{'pageCategory': 'Product', 'pageDepartment': 'Calzado', 'pageUrl': 'http://www.taf.com.mx/air-force-1-07-lv8-cu8070-100/p', 'pageTitle': 'AIR FORCE 1 07 LV8 | MASCULINO - tafmx', 'skuStockOutFromShelf': [], 'skuStockOutFromProductDetail': ['23312', '23313', '23314', '23316', '23325', '23326', '23327', '23328'], 'shelfProductIds': ['140', '141', '142', '3775', '3777', '3782', '3785', '545', '17', '314', '318', '530', '645', '801', '822', '940'], 'accountName': 'tafmx', 'pageFacets': [], 'productId': '3829', 'productReferenceId': 'CU8070-100', 'productEans': ['194502172393', '194502172409', '194502172416', '194502172423', '194502172430', '194502172447', '194502172454', '194502172461', '194502172478', '194502172485', '194502172492', '194502172508', '194502172515', '194502172522', '194502172539', '194502172546', '194502172553'], 'skuStocks': {'23312': 0, '23313': 0, '23314': 0, '23315': 11, '23316': 0, '23317': 19, '23318': 29, '23319': 22, '23320': 12, '23321': 7, '23322': 9, '23323': 15, '23324': 14, '23325': 0, '23326': 0, '23327': 0, '23328': 0}, 'productName': 'AIR FORCE 1 07 LV8', 'productBrandId': 2000004, 'productBrandName': 'Nike', 'productDepartmentId': 7, 'productDepartmentName': 'Calzado', 'productCategoryId': 8, 'productCategoryName': 'Sneakers', 'productListPriceFrom': '2199', 'productListPriceTo': '2199', 'productPriceFrom': '2199', 'productPriceTo': '2199', 'sellerId': '1', 'sellerIds': '1'}

请注意，如果script标记包含问题中未显示的其他内容，则可能需要使用更复杂的正则表达式