python - 如何访问从 google books API python 返回的 JSON 对象的值？

Question

我正在从 python 脚本访问 Google Books API，并且需要在获得的 JSON 对象中获取特定值。例如，如果您遵循以下步骤:

https://www.googleapis.com/books/v1/volumes?q=9781607055389

您将看到我尝试使用的 JSON 对象。我需要获取 description 键中包含的书籍描述。我在使用 urllib2 获取后使用 json.load 加载它。

我已尝试执行以下操作但无济于事:

a = json.load(urllib2.urlopen('https://www.googleapis.com/books/v1/volumes?q=9781607055389'))
print a.items[0].description

Answer 1

description 在另一本字典中，您忘记了:

>>> print a['items'][0]['volumeInfo']['description']
Photo tutorials show stitching in action for 50+ free-motion quilting designs to create modern quilts with classic style! Popular blogger and designer, Natalia Bonner, illustrates her instructions with detailed photos that make it easier to get beautiful results on your home sewing machine. Learn how to quilt all-over, as filler, on borders, and on individual blocks...using loops and swirls, feathers and flames, flowers and vines, pebbles and more! Includes tips for choosing batting and thread, layering and basting, starting and stopping, and prepping your machine are included. After you've practiced, show off your new skills with six geometric quilt projects.

您访问字典值的意图不是您在 python 中所做的。您可以使用 get() 函数，或者执行我所做的操作。 .items 起作用的原因是内置函数 .items()，它返回字典的结构。