将字典加载到Pandas Dataframe中

Question

I am trying to load a python dictionary into a Dataframe.

The structure of the dictionary is unusual, as follows:

a = {('a','b','c'): [0.2,0.3],('a','b','e'): [0.25,0.35]}

Before I converted to Python 3, the following code used to work

b = DataFrame(a.items(),columns=['Systems','stats'])

Now, with Python 3.5, I get the error message:

Error:

ValueError: DataFrame constructor not properly called!

Answer 1

I believe you need convert it to list, or upgrade to last version of pandas 0.25 , then not necessary:

a = {('a','b','c'): [0.2,0.3],('a','b','e'): [0.25,0.35]}

print (list(a.items()))
[(('a', 'b', 'c'), [0.2, 0.3]), (('a', 'b', 'e'), [0.25, 0.35])]

b = pd.DataFrame(list(a.items()),columns=['Systems','stats'])
print (b)
     Systems         stats
0  (a, b, c)    [0.2, 0.3]
1  (a, b, e)  [0.25, 0.35]