How to read JSON file in Python (2024)

FAQs

How to read JSON response data in Python? ›

When you receive a response from a server that contains JSON formatted data, you can use the . json() method to parse this data and convert it into a Python dictionary, which will allow you to interact with the data in a more… “Pythonic” way. For example: import requests response = requests.

Python has a built in module that allows you to work with JSON data. At the top of your file, you will need to import the json module. If you need to parse a JSON string that returns a dictionary, then you can use the json. loads() method.

To read a JSON response there is a widely used library called urllib in python. This library helps to open the URL and read the JSON response from the web. To use this library in python and fetch JSON response we have to import the json and urllib in our code, The json. loads() method returns JSON object.

Response: json() method

The json() method of the Response interface takes a Response stream and reads it to completion. It returns a promise which resolves with the result of parsing the body text as JSON .

The json. load() function accepts a file object as an argument and returns deserialized JSON data in the form of Python objects such as dictionaries, lists, strings, numbers, booleans, and null values. To read JSON data from a file, you need to open the file in read mode, extract the data using the json.

JSON is JavaScript Object Notation.

Python supports JSON through a built-in package called JSON. To use this feature, we import the JSON package in Python script. The text in JSON is done through quoted-string which contains the value in key-value mapping within { }. It is similar to the dictionary in Python.

Example - Parsing JSON

Use the JavaScript function JSON.parse() to convert text into a JavaScript object: const obj = JSON.parse('{"name":"John", "age":30, "city":"New York"}'); Make sure the text is in JSON format, or else you will get a syntax error.

How would you read the entire JSON data in the file JSON? ›

You can read JSON data using the read method, which is asynchronous and returns a promise. Assuming you have a config. json file, you can use the following code to read it: const bfj = require('bfj'); const path = './config.

Comparing Json:

Comparing json is quite simple, we can use '==' operator, Note: '==' and 'is' operator are not same, '==' operator is use to check equality of values , whereas 'is' operator is used to check reference equality, hence one should use '==' operator, 'is' operator will not give expected result.

Alternatively, you can employ a command-line tool or script such as jq to quickly and easily filter, query, or transform JSON data. Additionally, you can use a graphical user interface (GUI) tool or application like Postman to visually explore, edit, and extract data from JSON files.

You can access the content of a response in three different ways and formats. Here is a quick overview about the different ways and formats: content : This attribute returns the raw bytes of the response content. text : The text attribute returns the content as a normal UTF-8 encoded Python string.

The JSON Response Content

response. json() returns a JSON response in Python dictionary format so we can access JSON using key-value pairs. You can get a 204 error In case the JSON decoding fails.