我正在使用Python2.7，我要做的是：
我有以下json字符串。
http://www.ows.newegg.com/Products.egg/N82E16822148992
在这个字符串中，有多个名为FinalPrice的值。我正在尝试获取有关项目的MAIN FinalPrice（这里的项目是#N82E16822148992）。main FinalPrice将是指页面上的主项。这个JSON页面对应的页面是http://www.newegg.com/Product/Product.aspx?Item=N82E16822148992。
那么，有没有什么方法可以从通常10个左右的链接中获取我所需要的FinalPrice（我说通常是因为我只测试了3个链接的FinalPrices数量，它们都是10个）？我想也许我可以通过使用产品名来找到最终价格的位置，但是在产品名和FinalPrices之间总是有页面特定的字符。
我该怎么办呢？
这是我试过的：
我看过Python.org的JSON文档，但它对我找到特定的FinalPrice（或者我只是看错了？）
我试着将整个JSON页面变成一个字符串，并使用一些字符串操作（s.find，s[a:b]）来获得所需的FinalPrice，但是除了第一个FinalPrice之外，我找不到其他方法来获得任何FinalPrice。
我在google和stack overflow上搜索了这个问题的正确答案。
这就是我到目前为止所做的一切。
最佳答案
您链接的json数据的主要顶级数据结构只有一个FinalPrice键，因此获取此信息应该很简单：
>>> import urllib2, json
>>> data = json.load(urllib2.urlopen('http://www.ows.newegg.com/Products.egg/N82E16822148992'))
>>> print data[u'FinalPrice']
$79.99
您可以使用
pprint.pprint function快速了解数据结构：>>> from pprint import pprint
>>> pprint(data)
{u'AddToCartButtonText': u'Add to Cart',
u'AddToCartButtonType': u'AD',
u'AverageRating': 0,
u'BrandInfo': None,
u'CanAddToCart': False,
u'ComboCount': 5,
u'CoremetricsInfo': {u'Brand': u'Seagate',
u'CategoryID': u'IPS380',
u'PageID': u'PRODUCT: NBHD 320G|ST ST320LT014 7K SATA3G %_22-148-992 (22-148-992)',
u'ProductName': u'NBHD 320G|ST ST320LT014 7K SATA3G %_22-148-992'},
u'Discount': u'You Save: $10.00',
u'ETA': u'/Date(-62135568000000)/',
u'EmailFriendImageInfo': {u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S35$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S125$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S180$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S300$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S640$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S125$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S60$',
u'Title': None},
u'EnergyStarText': None,
u'FinalPrice': u'$79.99',
u'FreeShippingFlag': True,
u'HasMappingPrice': False,
u'Image': {u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S180$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S125$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S180$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S300$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S640$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S100$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S60$',
u'Title': None},
u'InstantSaving': 0,
u'Instock': True,
u'InstockForCombo': False,
u'IronEggDescription': None,
u'IsActivated': True,
u'IsCellPhoneItem': False,
u'IsComboBundle': False,
u'IsFeaturedItem': False,
u'IsHot': False,
u'IsInPMCC': False,
u'IsPreLaunch': False,
u'IsShellShockerItem': False,
u'IsShipByNewegg': True,
u'IsShowEnergyStarSection': False,
u'IsShowSoldOutText': False,
u'ItemGroupID': 0,
u'ItemMapPriceMarkType': 0,
u'ItemNumber': u'22-148-992',
u'ItemOwnerType': 0,
u'LimitQuantity': -1,
u'MailInRebateInfo': None,
u'MailInRebateText': None,
u'MappingFinalPrice': None,
u'Model': u'ST320LT014',
u'NeweggItemNumber': None,
u'NumberOfReviews': 0,
u'OriginalPrice': u'$89.99',
u'ParentItem': None,
u'ProductProperties': None,
u'ProductStockType': 0,
u'PromotionInfo': None,
u'PromotionText': u'',
u'ReturnPolicyInfo': {u'HtmlContent': None,
u'ID': u'44',
u'Name': u'Standard Return Policy'},
u'ReviewSummary': {u'Rating': 0, u'TotalReviews': u'[]'},
u'SellerId': None,
u'SellerItemPropertyList': None,
u'SellerName': None,
u'ShipByNewegg': 0,
u'ShippingInfo': {u'NormalShippingText': u'Free Shipping*',
u'RestrictedShippingText': u' Additional fees may apply for shipments to APO/FPO, AK, HI and PR.',
u'RestrictedShippingTitle': u'Shipping Restrictions',
u'SpecialShippingText': u' Additional fees may apply for shipments to APO/FPO, AK, HI and PR.'},
u'ShippingPromotionInfo': None,
u'ShoppingInsight': {u'Description': u'See what other informed Newegg customers purchased after viewing this product',
u'PromotionItems': [{u'AfterRebate': None,
u'FinalPrice': u'$149.99',
u'Instock': True,
u'IsCurrentItem': False,
u'IsFreeShipping': True,
u'IsShowOriginalPrice': False,
u'ItemBrand': {u'BrandId': 1305,
u'BrandImage': u'http://images10.newegg.com/brandimage/Brand1305.gif',
u'Code': 0,
u'Description': u'Seagate',
u'HasManfactoryLogo': True,
u'ManufactoryWeb': u'http://www.seagate.com',
u'WebSiteURL': None},
u'ItemImage': {u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S180W$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S125W$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S180W$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S300W$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S640W$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S125W$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-591-TS?$S60$',
u'Title': None},
u'ItemMapPriceMarkType': 0,
u'ItemNumber': u'22-148-591',
u'MappingFinalPrice': None,
u'OriginalPrice': u'$149.99',
u'Percentage': u'22',
u'ReviewSummary': {u'Rating': 4,
u'TotalReviews': u'[829]'},
u'Title': u'Seagate Momentus XT ST95005620AS 500GB 7200 RPM 32MB Cache 2.5" SATA 3.0Gb/s with NCQ Solid State Hybrid Drive -Bare Drive'},
{u'AfterRebate': None,
u'FinalPrice': u'$79.99',
u'Instock': True,
u'IsCurrentItem': True,
u'IsFreeShipping': True,
u'IsShowOriginalPrice': True,
u'ItemBrand': {u'BrandId': 1305,
u'BrandImage': u'http://images10.newegg.com/brandimage/Brand1305.gif',
u'Code': 0,
u'Description': u'Seagate',
u'HasManfactoryLogo': True,
u'ManufactoryWeb': u'http://www.seagate.com',
u'WebSiteURL': None},
u'ItemImage': {u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S180$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S125$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S180$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S300$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S640$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S125$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-TS?$S60$',
u'Title': None},
u'ItemMapPriceMarkType': 0,
u'ItemNumber': u'22-148-992',
u'MappingFinalPrice': None,
u'OriginalPrice': u'$89.99',
u'Percentage': u'16',
u'ReviewSummary': {u'Rating': 0,
u'TotalReviews': u'[]'},
u'Title': u'Seagate Momentus Thin ST320LT014 320GB 7200 RPM 16MB Cache 2.5" SATA 3.0Gb/s Internal Notebook Hard Drive -Bare Drive'},
{u'AfterRebate': None,
u'FinalPrice': u'$69.99',
u'Instock': True,
u'IsCurrentItem': False,
u'IsFreeShipping': False,
u'IsShowOriginalPrice': True,
u'ItemBrand': {u'BrandId': 1306,
u'BrandImage': u'http://images10.newegg.com/brandimage/Brand1306.gif',
u'Code': 0,
u'Description': u'Western Digital',
u'HasManfactoryLogo': True,
u'ManufactoryWeb': u'http://www.wdc.com/en/',
u'WebSiteURL': None},
u'ItemImage': {u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S180W$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S125W$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S180W$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S300W$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S640W$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S125W$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-136-280-TS?$S60$',
u'Title': None},
u'ItemMapPriceMarkType': 0,
u'ItemNumber': u'22-136-280',
u'MappingFinalPrice': None,
u'OriginalPrice': u'$89.99',
u'Percentage': u'16',
u'ReviewSummary': {u'Rating': 5,
u'TotalReviews': u'[1,299]'},
u'Title': u'Western Digital Scorpio Black WD3200BEKT 320GB 7200 RPM 16MB Cache 2.5" SATA 3.0Gb/s Internal Notebook Hard Drive -Bare Drive'},
{u'AfterRebate': None,
u'FinalPrice': u'$59.99',
u'Instock': True,
u'IsCurrentItem': False,
u'IsFreeShipping': True,
u'IsShowOriginalPrice': True,
u'ItemBrand': {u'BrandId': 1305,
u'BrandImage': u'http://images10.newegg.com/brandimage/Brand1305.gif',
u'Code': 0,
u'Description': u'Seagate',
u'HasManfactoryLogo': True,
u'ManufactoryWeb': u'http://www.seagate.com',
u'WebSiteURL': None},
u'ItemImage': {u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S180$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S125$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S180$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S300$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S640$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S125$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-906-TS?$S60$',
u'Title': None},
u'ItemMapPriceMarkType': 0,
u'ItemNumber': u'22-148-906',
u'MappingFinalPrice': None,
u'OriginalPrice': u'$69.99',
u'Percentage': u'11',
u'ReviewSummary': {u'Rating': 5,
u'TotalReviews': u'[1]'},
u'Title': u'Seagate Momentus Thin ST250LT003 250GB 5400 RPM 16MB Cache 2.5" SATA 3.0Gb/s Internal Notebook Hard Drive -Bare Drive'}]},
u'ShowOriginalPrice': True,
u'StaticText': None,
u'StrAddItem': None,
u'StrAlt': None,
u'StrCartImg': None,
u'SubCategoryId': 380,
u'SubCategoryName': u'Laptop Hard Drives',
u'Title': u'Seagate Momentus Thin ST320LT014 320GB 7200 RPM 16MB Cache 2.5" SATA 3.0Gb/s Internal Notebook Hard Drive -Bare Drive',
u'UnitPrice': 0,
u'Warnings': None,
u'WarrantyInfo': None,
u'XmlSpec': None,
u'imageGallery': [{u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S640$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S125$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S180$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S300$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S640$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S100$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z01?$S60$',
u'Title': None},
{u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S640$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S125$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S180$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S300$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S640$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S100$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z02?$S60$',
u'Title': None},
{u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S640$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S125$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S180$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S300$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S640$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S100$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z03?$S60$',
u'Title': None},
{u'FullPath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S640$',
u'ItemNumber': None,
u'PathSize100': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S100$',
u'PathSize125': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S125$',
u'PathSize180': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S180$',
u'PathSize300': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S300$',
u'PathSize35': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S35$',
u'PathSize60': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S60$',
u'PathSize640': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S640$',
u'SmallImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S100$',
u'ThumbnailImagePath': u'http://images17.newegg.com/is/image/newegg/22-148-992-Z04?$S60$',
u'Title': None}]}
然后您可以看到其他
FinalPrice条目是ShoppingInsight>PromotionItems结构的一部分，该结构是一个列表：>>> print data[u'ShoppingInsight'][u'PromotionItems'][0][u'FinalPrice']
$149.99
>>> print data[u'ShoppingInsight'][u'PromotionItems'][0][u'Title']
Seagate Momentus XT ST95005620AS 500GB 7200 RPM 32MB Cache 2.5" SATA 3.0Gb/s with NCQ Solid State Hybrid Drive -Bare Drive