How would I transfer information like a variable from javascript to python using AJAX and Flask

Solution

@app.route('/route_to_send_to/', methods=['GET'])
def route_to_send_to(variable):
    variable_sent = variable
    
    return jsonify({'variable':variable})
        var url = '/route_to_send_to/ + name;
        return $.ajax({
            type: "GET",
            url: url,
            }).then(function(data) {// Do something with the responce})
        });