Why is Pickle not serializing my array of classes?

Question

I\'m trying to serialize a large number of custom classes to disk using python\'s pickle. However, the classes aren\'t serializing properly.

Having looked at the docs i

Answer 1

Pickle only saves the instance attributes of a class, but Synonyms is a list, defined at class level. You should create the list in a __init__-method:

import pickle

class Entry:
    def __init__(self, text):
       self.Text = text

class Term:
    def __init__(self):
        self.Main = None
        self.Synonyms = []

def Save():
    term = Term()
    term.Main = Entry("Dog")
    term.Synonyms.append(Entry("Canine"))
    term.Synonyms.append(Entry("Pursue"))
    term.Synonyms.append(Entry("Follow"))
    term.Synonyms.append(Entry("Plague"))

    terms = []
    terms.append(term)

    with open('output.pickle', 'wb') as p:
        pickle.dump(terms, p)

def Load():
    with open('output.pickle', 'rb') as p:
        loadedTerms = pickle.load(p)
    return loadedTerms