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-rw-r--r--lib/param/json.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/param/json.py b/lib/param/json.py
index 4fa4933..c72cb11 100644
--- a/lib/param/json.py
+++ b/lib/param/json.py
@@ -12,4 +12,5 @@ class Json(Param):
"""
def __init__(self, value, classname=""):
super(Json, self).__init__(classname=classname)
- self.value = json.loads(value)
+ if value:
+ self.value = json.loads(value)