Sample of Flask receiving JSON

sample_route.py

# If /json route receives header "application/json"

@app.route("/json", methods=['GET','POST'])
def json():
    
    app.logger.debug("JSON received...")
    app.logger.debug(request.json)
    
    if request.json:
        mydata = request.json # will be 
        
        return "Thanks. Your age is %s" % mydata.get("age")

    else:
        return "no json received"