TypeError: unhashable type: 'dict', when dict used as a key for another dict [duplicate]
From the error, I infer that referenceElement is a dictionary (see repro below). A dictionary cannot be hashed and therefore cannot be used as a key to another dictionary (or itself for that matter!).
>>> d1, d2 = {}, {}>>> d1[d2] = 1Traceback (most recent call last): File "<input>", line 1, in <module>TypeError: unhashable type: 'dict'You probably meant either for element in referenceElement.keys() or for element in json['referenceElement'].keys(). With more context on what types json and referenceElement are and what they contain, we will be able to better help you if neither solution works.