Why Does Python `json.loads` Throw a `ValueError: Extra Data` Error?

Python json.loads Shows Value Error: Extra Data

When attempting to extract data from a JSON file named "new.json" and store it into a new JSON file, it's possible to encounter a ValueError: Extra data error while using json.load().

Understanding the Error

The error suggests that there is additional data in the JSON file beyond what is expected. This can happen when the JSON data is not properly formatted or when there are trailing characters at the end of the file.

Resolving the Issue

To resolve this issue, ensure that the JSON data in "new.json" is well-formed. This means it should conform to the JSON syntax rules, such as proper use of quotation marks and braces. Additionally, if there are any trailing characters after the last closing brace of the JSON object, they must be removed.

Alternative Approach

Instead of loading the entire JSON file at once, an alternative approach is to iterate over the file line by line and load each line as a separate JSON object. This allows you to capture only the lines that contain valid JSON data. Here's how you can do it:

tweets = []
with open('new.json', 'r') as file:
    for line in file:
        # skip lines that don't contain JSON objects
        if not line.strip():
            continue

        # try to load the line as JSON
        try:
            tweet = json.loads(line)
        except ValueError:
            # ignore lines that cannot be loaded as JSON
            continue

        # process the valid tweet data
        tweets.append(tweet)

This approach will skip any lines that are empty or do not contain valid JSON objects, reducing the likelihood of encountering the Extra data error.

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