Скачать или смотреть Accessing Nested Values in a JSON Response with Python and Flask

Learn how to easily extract nested values in a JSON response using Python and Flask. We provide a step-by-step guide to help you access complex data structures effortlessly!
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This video is based on the question https://stackoverflow.com/q/67034693/ asked by the user 'Luke To' ( https://stackoverflow.com/u/12865463/ ) and on the answer https://stackoverflow.com/a/67034794/ provided by the user 'Prem' ( https://stackoverflow.com/u/15367609/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding Nested JSON Structures with Python and Flask

Working with JSON data in Python is a common task, especially when dealing with web APIs. However, when the JSON structure is nested, extracting specific values can be a challenge. In this post, we'll address a common issue faced by developers: how to print the value of a particular key from a nested JSON response. We'll use a Python and Flask setup as our example.

The Problem

Imagine you have a JSON response from an API that looks somewhat like this:

[[See Video to Reveal this Text or Code Snippet]]

You want to extract and print the value associated with Number# en from this response. It can be a bit confusing, especially if you're not familiar with navigating through nested structures. Let's dive into how to access this data correctly.

The Solution

To access the Number# en value in the nested JSON, you need to understand the structure of the JSON response. The data field is an array (list) containing dictionaries. Therefore, you will need to access the first element of this list to retrieve the properties dictionary, and then the value of Number# en. Here's how you do it:

Step-by-Step Breakdown

Make the API Request: First, you'll need to make your GET request to fetch the data.

[[See Video to Reveal this Text or Code Snippet]]

Load the JSON Data: Use json.loads() to parse the response text into a Python dictionary.

[[See Video to Reveal this Text or Code Snippet]]

Access the Desired Value: Use the following code to access Number# en from the JSON response:

[[See Video to Reveal this Text or Code Snippet]]

Code Explanation

data_text['data'] accesses the list under the data key.

data_text['data'][0] fetches the first item in that list, which is a dictionary.

data_text['data'][0]['properties'] retrieves the properties dictionary from that item.

Finally, data_text['data'][0]['properties']['Number# en'] gives us the value you are looking for: 20934120.

Conclusion

Navigating through nested JSON structures can seem daunting at first, but once you understand the hierarchy, it becomes much simpler. By following the steps laid out in this guide, you should be able to confidently extract values from complex JSON responses in your Python and Flask applications.

If you have any further questions or need clarification on specific points, feel free to ask in the comments below!