gistfile1.py

>>> import ujson as json
>>> jd = json.dumps
>>> json_is_ujson = True
>>> 
>>> 
>>> def dumps(data, sort_keys=False):
...     if json_is_ujson:
...         if sort_keys:
...             raise Exception('ujson does not support sort_keys flag')
...         return jd(data)
...     else:
...         return jd(data, sort_keys=sort_keys)
... 
>>> 
>>> json.dumps = dumps