How to deal with ImmutableMultiDict

I’m trying to test my flask API with a POST request, but I have problems to deal with the ImmutableMultiDict.

The API:

@app.route("/df/", methods = ['GET', 'POST'])
def get_df():
    if request.method == 'POST':
        select = request.form

request:

curl -X POST http://127.0.0.1:5000/df/ -d '{"ticker": "ETH-PERP"}'

print(select):

ImmutableMultiDict([('{"ticker": "ETH-PERP"}', '')])

How do I access the value (“ETH-PERP”) ?

I tried:

select = request.form.getlist("ticker")

output: []

select = request.form.to_dict(flat=True)
print(select[0])

output: keyError: 0

select = request.form.to_dict().values()[0]

output: 'dict_values' object is not subscriptable

any suggestions?

Answer

The problem is that the request data is not a form, it’s JSON.

You should probably use request.json to read it, which should give you a regular dictionary.