title: Load JSON file in Python without the 'u in the key
body: <p>I was doing some work in Python with graphs and wanted to a save some structures in files so I could load them fast when I resumed work. One of those was a dictionary which I saved in JSON format using json.dump.</p>
  
  <p>When I load it back with json.load the keys have changed from "1" to u'1'. Why is that? What does it mean? How can I change it? I use the keys later to make some lists which I will then use with the original graph which nodes are the keys (in integer form) and it causes problem in comparisons...</p>