使用AJAX发送JSON到Flask语法错误

Question

 url: '/upload',
 type: 'POST',
 data: JSON.stringify(pdata),
 contentType: "application/json; charset=utf-8",
 dataType: "text",

is what I'm using to POST the JSON and it is sending it with the double quotes needed

but in flask

content = request.get_json()

gives me content with the double quotes swapped with single quotes

for example {"S":[],"R":[]} goes to {'S':[],'R':[]}

it is something I'm doing wrong or do I need to somehow convert this back to two quotes if I want to send this to a javascript program?

Answer 1

request.get_json() returns a python dictionary with values of double-quoted items represented as strings. When you print a python string it's printed with single quotes by default.

When the dictionary is converted back into JSON format you will get doublequotes.