How to Create JSON in Python Flask.md

How to Create JSON in Python Flask

Captured: 2016-06-25 at 23:54 from codehandbook.org

This post is in reply to a user comment on the Working with JSON data in Python Flask post where one of the readers asked how to create the following JSON data :

{
    "Employees": [{
        "firstName": "Roy",
        "lastName": "Augustine"
    }, {
        "firstName": "Roy",
        "lastName": "Augustine"
    }]
}

Start by creating a simple python flask app with a method to return employee JSON data.

@app.route("/getEmployeeList")
def getEmployeeList():
    
    try:

       # Code will be here

    except Exception ,e:
        print str(e)

    return "Employee"

I'll be importing json and _jsonify _python app.

from flask import Flask,jsonify,json

The basic logic for creating the above JSON data is creating a dictionary and appending it to a list. Once the list is complete we'll convert the list to JSON data. Here is the complete getEmployeeList python method :

@app.route("/getEmployeeList")
def getEmployeeList():
    
    try:

        # Initialize a employee list
        employeeList = []

        # create a instances for filling up employee list
        for i in range(0,2):
        empDict = {
        'firstName': 'Roy',
        'lastName': 'Augustine'}
            employeeList.append(empDict)
    
        # convert to json data
        jsonStr = json.dumps(employeeList)

    except Exception ,e:
        print str(e)

    return jsonify(Employees=jsonStr)

Save the changes and try to run the above code. http://localhost:5000/getEmployeeList should return the required JSON data:

{
    "Employees": [{
        "firstName": "Roy",
        "lastName": "Augustine"
    }, {
        "firstName": "Roy",
        "lastName": "Augustine"
    }]
}

Wrapping It Up

In this short tutorial, we saw how to create JSON data in Python Flask. I would also recommend reading working with JSON data in Python Flask.

Also read : Other Python Programming Tutorials on CodeHandbook.