Suppose you are making AJAX call in below way, you will get the response dict as resValue. use JSON.parse method on it
$.getJSON( "/url", {params }, function( data, status, xhr ) {
$.each(data.response, function(resKey, resValue){
if(resKey == "success"){
var _result = JSON.parse(resValue);
}
}
}
solved Accessing python dictionary in javascript [duplicate]