Flask rest api How to retrieve json request

[raysefo]

Hello,
I am new to Python. I have a flask rest api. I am trying to call another rest api inside of my method. I would like to know if there is a way to get json request data when my method is called?

Here is my code portion:

# POST /purchase_initiation
@app.route('/purchase_initiation', methods=['POST'])
def initiation():
    try:
        # if request.is_json:
            # getting request data
            request_data = request.json()
            print request_data

On the Print I am getting 'NoneType' object is not callable error. By the way I am sending POST request from POSTMAN.

Thanks in advance.
Best Regards.