【Python】Amazon Simple Product APIをラップしてLookupによるデータの取得をさらにシンプルにしてみた。

api.lookup.py

# coding: utf-8

from amazon.api import AmazonException, LookupException, AsinNotFound

class AmazonAPILookupWrapper(object):
    def __init__(self, account):
        self.account = account

    def __enter__(self):
        from amazon.api import AmazonAPI
        
        self.API = AmazonAPI(
            self.account["ACCESS_KEY"],
            self.account["SECRET_KEY"],
            self.account["ASSOC_TAG"])
            region = self.account["REGION"] if "REGION" in self.account else "JP"
        return self

    def __exit__(self, exception_type, ecception_value, traceback):
    	pass

    def Lookup(self, **kwargs):
    	if "ItemId" not in kwargs:
    	    raise AmazonException("ItemId Not Found")
    	
    	if isinstance(kwargs["ItemId"], list):
    	    kwargs["ItemId"] = ",".join(kwargs["ItemId"]

        response = self.API.lookup(**kwargs)

        if hasattr(response, "__iter__"):
            for item in response:
                self.item = item
                yield self
        else:
            self.item = response
            yield self
            
	def setAsin(self, asin):
		self.Asin = asin

	# インチをセンチに変換
    def inches2cm(self, data):
        return round(float(data) / 100 * 2.54, 2)

	# ポンドをグラムに変換
    def pounds2g(self, data):
        return round(float(data) / 100 * 0.4536 * 1000, 2)

	@property
	def region(self):
		return self.API.region

    @property
    def title(self):
        return self.item.title

	# 大カテゴリを取得
    @property
    def category(self):
        if len(self.item.browse_nodes) > 0:
            return self.item.browse_nodes[0].ancestors[-1].name.text
        else:
            return None

    @property
    def image_url(self):
        if self.item.medium_image_url:
            return str(self.item.medium_image_url)

    @property
    def attributes(self):
        return self.item.get_attributes([
            "PackageDimensions.Weight",
            "PackageDimensions.Width",
            "PackageDimensions.Height",
            "PackageDimensions.Length"
        ])

    @property
    def weight(self):
        if "PackageDimensions.Weight" in self.attributes:
            return self.pounds2g(self.attributes["PackageDimensions.Weight"])

    @property
    def raw_weight(self):
        if "PackageDimensions.Weight" in self.attributes:
            return self.attributes["PackageDimensions.Weight"]

    @property
    def width(self):
        if "PackageDimensions.Width" in self.attributes:
            return self.inches2cm(self.attributes["PackageDimensions.Width"])

    @property
    def raw_width(self):
        if "PackageDimensions.Width" in self.attributes:
            return self.attributes["PackageDimensions.Width"]

    @property
    def height(self):
        if "PackageDimensions.Height" in self.attributes:
            return self.inches2cm(self.attributes["PackageDimensions.Height"])

    @property
    def raw_height(self):
        if "PackageDimensions.Height" in self.attributes:
            return self.attributes["PackageDimensions.Height"]

    @property
    def length(self):
        if "PackageDimensions.Length" in self.attributes:
            return self.inches2cm(self.attributes["PackageDimensions.Length"])

    @property
    def raw_length(self):
        if "PackageDimensions.Length" in self.attributes:
            return self.attributes["PackageDimensions.Length"]