如何使用python- Amazon -product-api item_lookup函数从亚马逊获取商品报价列表？

Question

我正在尝试编写一个函数来获取基于ASIN的商品的报价列表(它们的价格)：

def price_offers(asin):
    from amazonproduct import API, ResultPaginator, AWSError
    from config import AWS_KEY, SECRET_KEY
    api = API(AWS_KEY, SECRET_KEY, 'de')
    str_asin = str(asin)
    node = api.item_lookup(id=str_asin, ResponseGroup='Offers', Condition='All', MerchantId='All')
    for a in node:
        print a.Offer.OfferListing.Price.FormattedPrice

我正在阅读http://docs.amazonwebservices.com/AWSECommerceService/latest/DG/index.html?ItemLookup.html，并试图让它工作，但它一直在说：

Failure instance: Traceback: <type 'exceptions.AttributeError'>: no such child: {http://webservices.amazon.com/AWSECommerceService/2009-10-01}Offer

Answer 1

您的回复中似乎没有优惠元素。试一试

node = api.item_lookup(...)
from lxml import etree
print etree.tostring(node, pretty_print=True)

来查看返回的XML是什么样子。

Answer 2

那好，谢谢。对于其他可能有同样问题的人，要回答我自己的问题，正确的方法是：

def price_offers(asin):
    from amazonproduct import API, ResultPaginator, AWSError
    from config import AWS_KEY, SECRET_KEY
    api = API(AWS_KEY, SECRET_KEY, 'de')
    str_asin = str(asin)
    node = api.item_lookup(id=str_asin, ResponseGroup='Offers', Condition='All', MerchantId='All')
    for a in node.Items.Item.Offers.Offer:
        print a.OfferListing.Price.FormattedPrice

亚马逊产品来自http://pypi.python.org/pypi/python-amazon-product-api