What causes the error “_pickle.UnpicklingError: invalid load key, ' '.”?

Question

I\'m trying to storage 5000 data elements on an array. This 5000 elements are storage on an existent file (therefore it\'s not empty).

But I\'m getting an error an

Answer 1

I had a similar error but with different context when I uploaded a *.p file to Google Drive. I tried to use it later in a Google Colab session, and got this error:

    1 with open("/tmp/train.p", mode='rb') as training_data:
----> 2     train = pickle.load(training_data)
UnpicklingError: invalid load key, '<'.

I solved it by compressing the file, upload it and then unzip on the session. It looks like the pickle file is not saved correctly when you upload/download it so it gets corrupted.