Скачать или смотреть How to Convert JSON Files to CSV in Python

Learn how to convert your JSON files to CSV format using Python with an easy-to-follow script tailored for Jupyter Notebook.
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This video is based on the question https://stackoverflow.com/q/77916147/ asked by the user 'Abdul Khayum' ( https://stackoverflow.com/u/21385711/ ) and on the answer https://stackoverflow.com/a/77916672/ provided by the user 'JonSG' ( https://stackoverflow.com/u/218663/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Convert JSON Files to CSV in Python: A Step-by-Step Guide

Converting JSON files to CSV format can be a daunting task, especially if you have specific requirements such as extracting multiple fields from the JSON structure. In this guide, we will dive into a real-world problem that many data scientists face: extracting two columns of gene names from a JSON file and converting them into a structured CSV file.

Understanding the Problem

You may come across JSON files containing biological data with gene names and their corresponding summaries and scores. The main challenge here is to extract specific fields from the JSON and organize them into a CSV format, especially when you need to split gene names into two separate columns.

Example JSON Structure

Here is an example of the JSON data we'll be working with:

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Desired CSV Structure

We want to convert the above JSON data into a CSV format that looks like this:

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

Proposed Solution

To tackle this problem, we can use a Python script that defines how to map the JSON data into the desired CSV format. Below, I’ll guide you through the steps to achieve this.

Step-by-Step Implementation

Step 1: Define a Field Mapping Function

We need to create a mapping between the keys in our JSON and the corresponding values we want in our CSV. This can be done using lambda functions.

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Step 2: Reshape the Data

Next, we define a function that will reshape the JSON data according to our mapping:

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

Step 3: Generate the CSV File

Now, we can finally convert our reshaped data into a CSV file using Python’s built-in csv module.

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

Conclusion

By following the steps outlined above, you can easily convert JSON files into a structured CSV format, even when needing to extract multiple columns of gene names. This approach is not only helpful for biologists but also for anyone handling JSON data in a structured environment, making their data analysis much easier.

Feel free to adjust the mapping or extend the functionality to suit your specific needs. Happy coding!