PythonAPI/coco.py support unicode result file name

PythonAPI/pycocotools/coco.py

@@ -293,7 +293,7 @@ class COCO:
 
         print 'Loading and preparing results...     '
         tic = time.time()
-        if type(resFile) == str:
+        if type(resFile) == str or type(resFile) == unicode:
             anns = json.load(open(resFile))
         elif type(resFile) == np.ndarray:
             anns = self.loadNumpyAnnotations(resFile)