硬json拉值

My json has structure:

{"0":{"pozycja":0,"znizka":{"0":"0.00"},"autor":{"0":"Cream Software"}},"1":{"pozycja":1,"znizka":{"0":"0.00"},"autor":{"0":"Cream Software"}},"2":{"pozycja":2,"znizka":{"0":"0.00"},"autor":{"0":"Cream Software"}},...}

I try tu pull the values like 'znizka' and 'autor', with to loops, no succes. I dont know if it concernes JSON.stringify which I dont have in code(I dont know how to put it in $.getJSON) or it is simply the strange format of json. Thank you for help!

$.getJSON("./baza.json", function(data){
console.log(data);
console.log(data.length);
for (var i = 0; i < data.length; i ++ ){
       $.each(data[i], function(index, items) {
           var pozycja = items.pozycja;
           var znizka = items.znizka;
           $('.list').append('<li>' + pozycja + '</li>' + '<li>' + znizka + '</li>');
       });
   }

});

var json={"0":{"pozycja":0,"znizka":{"0":"0.00"},"autor":{"0":"Cream Software"}},"1":{"pozycja":1,"znizka":{"0":"0.00"},"autor":{"0":"Cream Software"}},"2":{"pozycja":2,"znizka":{"0":"0.00"},"autor":{"0":"Cream Software"}}};
var obj=jQuery.parseJSON(JSON.stringify(json));
$.each(obj,function(key,value){
   console.log(value.pozycja);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

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