Introduction to jsonstream

jsonstream is a powerful library for efficient and incremental parsing of JSON data. It is designed to handle large JSON datasets seamlessly by parsing them in a streaming fashion. This is particularly useful when dealing with large files or API responses, where loading the entire JSON object into memory can be impractical.

Getting Started with jsonstream

To begin using jsonstream, first install the library using pip:

pip install jsonstream

API Examples and Usage

Basic Usage

Here’s a basic example of how to use jsonstream to parse a JSON file incrementally:

 import jsonstream
with open('large_file.json', 'r') as file:
    for obj in jsonstream.load(file):
        print(obj)

Customizing the Stream

jsonstream allows you to customize the parsing process. For example, you can parse a specific part of a JSON file:

 import jsonstream
with open('large_file.json', 'r') as file:
    parser = jsonstream.Parser('$.records[*].fields')
    for record in parser(file):
        print(record)

Parsing from a URL

You can also parse JSON data from a URL directly:

 import jsonstream import requests
response = requests.get('https://api.example.com/data')
for item in jsonstream.load(response.iter_content(chunk_size=1024)):
    print(item)

Advanced Filtering

jsonstream supports advanced filtering options:

 import jsonstream
with open('complex_file.json', 'r') as file:
    parser = jsonstream.Parser("$.store.book[?(@.price < 10)].title")
    for title in parser(file):
        print(title)

Example Application

Let’s create a simple application that uses jsonstream to process JSON data from an API:

 import jsonstream import requests
def fetch_books_under_ten_dollars():
    response = requests.get('https://api.example.com/books')
    parser = jsonstream.Parser("$.store.book[?(@.price < 10)]")

    for book in parser(response.iter_content(chunk_size=1024)):
        print(book)

if __name__ == "__main__":
    fetch_books_under_ten_dollars()

This application fetches books priced under ten dollars from an API and prints their details.

With the flexibility and efficiency offered by jsonstream, you can handle large JSON datasets with ease and incorporate JSON streaming in your applications.

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