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Learn how to dynamically replace placeholders in a Word document with values from a JSON object using Python's `python-docx` library.
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How to Replace JSON Values in a Document using Python

Do you need to replace certain placeholders in a Word document with specific values from a JSON object? If you're using Python, the python-docx library makes it easy to manipulate Word documents, but it can be tricky when it comes to integrating JSON data. In this guide, we'll walk through the process step-by-step, helping you transform your document swiftly and accurately.

Understanding the Problem

Let’s say you have a Word document, test.docx, that contains placeholders like prenom and -nom-. Your goal is to replace these placeholders with corresponding values from a JSON object. The initial code you provided might not effectively handle the JSON structure you have, which includes a list of dictionaries within a field called "data".

Your Initial Approach

You attempted to use a dictionary to perform the replacements, but with a JSON format, you need to access the nested data directly. Below is your original code:

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

The Solution: Replacing Placeholder Values from JSON

To achieve your goal, you need to iterate over the list contained in the "data" key of your JSON object. Here’s how to do it effectively:

Step 1: Load Your JSON Data

First, you will define your JSON object directly in the code (in practical use, you might load this from a file or API). Here’s how your JSON structure looks:

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

Step 2: Open the Word Document

Using the python-docx library to open the document is straightforward. Make sure you've installed the library:

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

Then use the following block of code to open your document:

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

Step 3: Iterate Over JSON and Replace

You need to loop over the paragraphs in your document and then loop over each dictionary inside your JSON data. Here’s the adjusted code for this process:

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

Step 4: Save the Document

After the replacements are made, don’t forget to save your document. This is done with the doc.save(FILE) command, which we’ve included in the previous code blocks.

Conclusion

By following these steps, you can integrate values from a JSON object directly into your Word document using Python. The key to success is understanding how to navigate through nested JSON structures and properly utilize the python-docx library to manipulate document text. This method opens numerous possibilities for automated document generation, enabling efficient workflows.

Now that you know how to replace JSON values in a document using Python, you can take on more complex document manipulations with ease. Happy coding!