remove except only clauses

jedi/_compatibility.py

@@ -8,7 +8,7 @@ import imp
 import os
 try:
     import importlib
-except:
+except ImportError:
     pass
 
 is_py3k = sys.hexversion >= 0x03000000

jedi/cache.py

@@ -25,7 +25,7 @@ import json
 import hashlib
 try:
     import cPickle as pickle
-except:
+except ImportError:
     import pickle
 import shutil