Cannot load defaultdict of defaultdict object from pickle file

Asked Feb 04 '22 at 16:40

Active Feb 04 '22 at 16:40

Viewed 52 times

I am trying to store this defaultdict object using pickle:

def dd():
    return defaultdict(int)
model = defaultdict(dd)

My first try was to use lambda, but according to this answer, I have changed it to external function. Still, when I want to load my object using following code:

import pickle
file = open("../model/trigram-model.pkl", "rb")
model = pickle.load(file)

It gives me the following error:

AttributeError: Can't get attribute 'dd' on <module '__main__' (built-in)>

I have tried redefining dd function as well, but it then shows:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: 74

asked Feb 04 '22 at 16:40

let me down slowly

You have to import `dd` before trying to load the pickle file. – Barmar Feb 04 '22 at 16:46
what is the difference between importing and defining? – let me down slowly Feb 04 '22 at 16:49
1

If I define `dd` before calling `pickle.load(file)` it works fine for me. – Barmar Feb 04 '22 at 16:57
Thanks, I forgot to define dd before loading, and now that I defined it before, it works! – let me down slowly Feb 04 '22 at 17:04

Cannot load defaultdict of defaultdict object from pickle file

0 Answers0