How to check if a variable is a dictionary in python
This question already has an answer here:
 if type(ele) is dict或者使用isinstance(ele,dict),你可以使用,如果你使用了子类型的字典, 
d = {'abc':'abc','def':{'ghi':'ghi','jkl':'jkl'}}
for ele in d.values():
    if isinstance(ele,dict):
       for k, v in ele.items():
           print(k,' ',v)
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