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-rw-r--r--sphinx/util/jsonimpl.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/sphinx/util/jsonimpl.py b/sphinx/util/jsonimpl.py
index b83661a7e..fda85b5e3 100644
--- a/sphinx/util/jsonimpl.py
+++ b/sphinx/util/jsonimpl.py
@@ -13,8 +13,10 @@ import UserString
try:
import json
+ # json-py's json module has not JSONEncoder; this will raise AttributeError
+ # if json-py is imported instead of the built-in json module
JSONEncoder = json.JSONEncoder
-except ImportError:
+except (ImportError, AttributeError):
try:
import simplejson as json
JSONEncoder = json.JSONEncoder