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python requests post large json

Narkw Brahma

Narkw Brahma

• 1 min read

Python Requests Post Large JSON

If you are working with APIs, you might need to send a large JSON payload as a request. In Python, you can use the Requests library to do this easily.

Using the Requests Library

First, you need to install the Requests library:


!pip install requests

Once you have installed the library, you can start using it to send POST requests. Here's an example:


import requests

url = 'https://example.com/api/'
data = {'key': 'value'}
response = requests.post(url, json=data)

print(response.json())

In this example, we are sending a POST request to 'https://example.com/api/' with a JSON payload of {'key': 'value'}. The response is then printed as JSON.

If you need to send a large JSON payload, you can simply pass it as the 'json' parameter to the post() method. Requests will automatically serialize the JSON data and set the appropriate headers:


import requests

url = 'https://example.com/api/'
data = {'key': 'value' * 1000000} # a large JSON payload
response = requests.post(url, json=data)

print(response.json())

In this example, we are sending a JSON payload that is 1 million characters long. Requests will handle this without any issues.

Using Chunked Encoding

If you are sending very large JSON payloads, you might run into memory issues. In this case, you can use chunked encoding to send the data in smaller chunks.

Here's an example:


import requests

url = 'https://example.com/api/'

def json_generator():
    with open('large.json', 'rb') as f:
        while True:
            chunk = f.read(1024)
            if not chunk:
                break
            yield chunk

response = requests.post(url, data=json_generator())

print(response.json())

In this example, we are reading a large JSON file ('large.json') in 1024-byte chunks and sending them as the request data using a generator. Requests will automatically use chunked encoding for the request.

Using chunked encoding can help you send very large JSON payloads without running into memory issues.

Conclusion

Sending large JSON payloads with Python Requests is easy. You can simply pass the data as the 'json' parameter to the post() method, or use chunked encoding to send the data in smaller chunks.

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