Python导航lxml.objectify属性

Question

我在访问ObjectifiedElement及其属性的列表时遇到问题。我有一个包，它只给我一个ObjectifiedElement类型的列表，我尝试使用lxml.objectify.dump转换列表中的第一个元素

这个错误是不相关的，所以我将在这里删除。这是我用来输出下面对象的代码

print ("Images: ")
print (lxml.objectify.dump(self.product.images[0]))

这是输出；

{http://webservices.amazon.com/AWSECommerceService/2013-08-01}ImageSet = None [ObjectifiedElement]
  * Category = 'variant'
    {http://webservices.amazon.com/AWSECommerceService/2013-08-01}SwatchImage = None [ObjectifiedElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL = 'https://images-eu.ssl-images-amazon.com/images/I/41NqvDXw0rL._SL30_.jpg' [StringElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height = 17 [IntElement]
          * Units = 'pixels'
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width = 30 [IntElement]
          * Units = 'pixels'
    {http://webservices.amazon.com/AWSECommerceService/2013-08-01}SmallImage = None [ObjectifiedElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL = 'https://images-eu.ssl-images-amazon.com/images/I/41NqvDXw0rL._SL75_.jpg' [StringElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height = 42 [IntElement]
          * Units = 'pixels'
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width = 75 [IntElement]
          * Units = 'pixels'
    {http://webservices.amazon.com/AWSECommerceService/2013-08-01}ThumbnailImage = None [ObjectifiedElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL = 'https://images-eu.ssl-images-amazon.com/images/I/41NqvDXw0rL._SL75_.jpg' [StringElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height = 42 [IntElement]
          * Units = 'pixels'
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width = 75 [IntElement]
          * Units = 'pixels'
    {http://webservices.amazon.com/AWSECommerceService/2013-08-01}TinyImage = None [ObjectifiedElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL = 'https://images-eu.ssl-images-amazon.com/images/I/41NqvDXw0rL._SL110_.jpg' [StringElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height = 62 [IntElement]
          * Units = 'pixels'
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width = 110 [IntElement]
          * Units = 'pixels'
    {http://webservices.amazon.com/AWSECommerceService/2013-08-01}MediumImage = None [ObjectifiedElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL = 'https://images-eu.ssl-images-amazon.com/images/I/41NqvDXw0rL._SL160_.jpg' [StringElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height = 90 [IntElement]
          * Units = 'pixels'
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width = 160 [IntElement]
          * Units = 'pixels'
    {http://webservices.amazon.com/AWSECommerceService/2013-08-01}LargeImage = None [ObjectifiedElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL = 'https://images-eu.ssl-images-amazon.com/images/I/41NqvDXw0rL.jpg' [StringElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height = 281 [IntElement]
          * Units = 'pixels'
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width = 500 [IntElement]
          * Units = 'pixels'
    {http://webservices.amazon.com/AWSECommerceService/2013-08-01}HiResImage = None [ObjectifiedElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL = 'https://images-eu.ssl-images-amazon.com/images/I/71whgyNdlVL.jpg' [StringElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height = 1440 [IntElement]
          * Units = 'pixels'
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width = 2560 [IntElement]
          * Units = 'pixels'

我尝试在每个实例中获取URL的属性。

更新

我已经设法在一个循环中访问了对象属性。以下是代码；

for e in self.product.images[0].getchildren():
    print("Tag: L1: "+e.tag)
    for v in e.getchildren():
        print("Tag: L2: "+v.tag+" : "+v.text)

我得到了这个；

Tag: L1: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}SwatchImage
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL : https://images-eu.ssl-images-amazon.com/images/I/41F%2BAxAz4BL._SL30_.jpg
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height : 17
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width : 30
Tag: L1: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}SmallImage
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL : https://images-eu.ssl-images-amazon.com/images/I/41F%2BAxAz4BL._SL75_.jpg
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height : 42
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width : 75
Tag: L1: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}ThumbnailImage
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL : https://images-eu.ssl-images-amazon.com/images/I/41F%2BAxAz4BL._SL75_.jpg
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height : 42
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width : 75
Tag: L1: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}TinyImage
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL : https://images-eu.ssl-images-amazon.com/images/I/41F%2BAxAz4BL._SL110_.jpg
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height : 62
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width : 110
Tag: L1: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}MediumImage
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL : https://images-eu.ssl-images-amazon.com/images/I/41F%2BAxAz4BL._SL160_.jpg
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height : 90
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width : 160
Tag: L1: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}LargeImage
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL : https://images-eu.ssl-images-amazon.com/images/I/41F%2BAxAz4BL.jpg
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height : 281
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width : 500
Tag: L1: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}HiResImage
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL : https://images-eu.ssl-images-amazon.com/images/I/81i%2BN3GG5rL.jpg
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Height : 1440
Tag: L2: {http://webservices.amazon.com/AWSECommerceService/2013-08-01}Width : 2560

现在，我正在尝试访问每个属性并在不使用循环的情况下获取HiResImage URL。

Answer 1

你试过print self.product.images[0].HiResImage.URL吗？

编辑：

我模拟了转储的最小化对象，使其只包含您想要访问的元素

a = '''<f:ImageSet xmlns:f="http://webservices.amazon.com/AWSECommerceService/2013-08-01" Category = 'variant'>
    <f:HiResImage xmlns:f="http://webservices.amazon.com/AWSECommerceService/2013-08-01">
        <f:URL xmlns:f="http://webservices.amazon.com/AWSECommerceService/2013-08-01">https://images-eu.ssl-images-amazon.com/images/I/71whgyNdlVL.jpg</f:URL>
    </f:HiResImage>
</f:ImageSet>'''

o = objectify.fromstring(a)
print objectify.dump(o)

作为结果给予：

{http://webservices.amazon.com/AWSECommerceService/2013-08-01}ImageSet = None [ObjectifiedElement]
  * Category = 'variant'
    {http://webservices.amazon.com/AWSECommerceService/2013-08-01}HiResImage = None [ObjectifiedElement]
        {http://webservices.amazon.com/AWSECommerceService/2013-08-01}URL = 'https://images-eu.ssl-images-amazon.com/images/I/71whgyNdlVL.jpg' [StringElement]

这与你发布的内容相似。然后我可以像这样访问URL：

>>> print o.HiResImage.URL
https://images-eu.ssl-images-amazon.com/images/I/71whgyNdlVL.jpg