How do you return a JSON response in Python?

How do you return a response in JSON format in a python flask?

Use flask. jsonify() to return a JSON response

  1. app = flask. Flask(__name__)
  2. @app. route(“/”)
  3. def index():
  4. return flask. jsonify(response_value_1=1,response_value_2=”value”)
  5. app. run(host=”″, port=8080)

How do I return a JSON file?

3 Answers

  1. Read the file as a string.
  2. Parse it as a JSON object into a CLR object.
  3. Return it to Web API so that it can be formatted as JSON (or XML, or whatever)

How do you create a JSON response in Python?

How to create a JSON object in Python

  1. data_set = {“key1”: [1, 2, 3], “key2”: [4, 5, 6]}
  2. json_dump = json. dumps(data_set)
  3. print(json_dump) String of JSON object.
  4. json_object = json. loads(json_dump)
  5. print(json_object[“key1”]) JSON object.

What does JSON () return?

json() … It returns a promise which resolves with the result of parsing the body text as JSON . Note that despite the method being named json() , the result is not JSON but is instead the result of taking JSON as input and parsing it to produce a JavaScript object.

What does Jsonify return in python?

jsonify() is a helper method provided by Flask to properly return JSON data. jsonify() returns a Response object with the application/json mimetype set, whereas json. dumps() simply returns a string of JSON data.

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How do you Jsonify a response?

jsonify serializes the data you pass it to JSON. If you want to serialize the data yourself, do what jsonify does by building a response with status=200 and mimetype=’application/json’ . Pass keyword arguments to flask. jsonify and they will be output as a JSON object.

Can ActionResult return json?

Json inherits ActionResult so it is still a valid return type. Same thing for redirect actions, view actions and so on. You can update your method to explicitly return a fixed result, or leave it as ActionResult and the method can adapt to send different response types depending on its logic.

What does json () do in Python?

json() – Python requests. response. json() returns a JSON object of the result (if the result was written in JSON format, if not it raises an error). Python requests are generally used to fetch the content from a particular resource URI.

How do I extract data from a json file in Python?


  1. Create a new Python file an import JSON.
  2. Crate a dictionary in the form of a string to use as JSON.
  3. Use the JSON module to convert your string into a dictionary.
  4. Write a class to load the data from your string.
  5. Instantiate an object from your class and print some data from it.

How do you write a JSON file in Python?

After converting dictionary to a JSON object, simply write it to a file using the “write” function. The JSON package has the “dump” function which directly writes the dictionary to a file in the form of JSON, without needing to convert it into an actual JSON object.

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What is JSON format?

JavaScript Object Notation (JSON) is a standard text-based format for representing structured data based on JavaScript object syntax. It is commonly used for transmitting data in web applications (e.g., sending some data from the server to the client, so it can be displayed on a web page, or vice versa).

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