Traceback (most recent call last):

 "c callback", line 12, in <module>

 "<string>", line 11, in <module>TypeError: could not convert py type to js type
Traceback (most recent call last):


 "/Users/stefano/Projects/Python/devinterface/saleor/saleor/order/views.py", line 117, in start_payment

form = payment.get_form(data=request.POST or None)


 "/Users/stefano/.virtualenvs/saleor/lib/python3.6/site-packages/payments/models.py", line 122, in get_form

return provider.get_form(self, data=data)


 "/Users/stefano/.virtualenvs/saleor/lib/python3.6/site-packages/payments/stripe/__init__.py", line 30, in get_form

form.save()


 "/Users/stefano/.virtualenvs/saleor/lib/python3.6/site-packages/payments/stripe/forms.py", line 59, in save

self.payment.attrs.charge = stripe.util.json.dumps(self.charge)
AttributeError: module 'stripe.util' has no attribute 'json'
