[tests] increasing coverage

GPy/__init__.py

@@ -43,20 +43,6 @@ def load(file_or_path):
     :param file_name: path/to/file.pickle
     """
     try:
-        unicode = unicode
-    except NameError:
-        # 'unicode' is undefined, must be Python 3
-        str = str
-        unicode = str
-        bytes = bytes
-        basestring = (str,bytes)
-    else:
-        # 'unicode' exists, must be Python 2
-        str = str
-        unicode = unicode
-        bytes = str
-        basestring = basestring    
-        try:
         import cPickle as pickle
         if isinstance(file_or_path, basestring): 
             with open(file_or_path, 'rb') as f:
@@ -65,7 +51,7 @@ def load(file_or_path):
             m = pickle.load(file_or_path)
     except:
         import pickle
-        if isinstance(file_or_path, basestring): 
+        if isinstance(file_or_path, str): 
             with open(file_or_path, 'rb') as f:
                 m = pickle.load(f)
         else: