data2 = []
with open("AllOutputMethodsObj.txt", "rb") as f:
    for _ in range(pickle.load(f)):
        data2.append(pickle.load(f))
print (str(data2))

for _ in range(pickle.load(f)):
EOFError: Ran out of input

import pickle
objs = dict(a=1, b=2), [3, 4], {5, 6}
pickle.dump(objs, open('test.tt', 'wb'))
for ob in pickle.load(open('test.tt', 'rb')):
    print(ob)

import pickle

with open("objects.pickle", "rb") as file:
    a, b, c = pickle.load(file)

with open("objects.pickle", "wb") as file:
    pickle.dump([a, b, c], file)

import shelve

with shelve.open('objects') as db:
    db['a'] = a
    ...
    db['b'] = b

with shelve.open('objects') as db:
    a = db['a']  # read
    a += 1       # modify
    db['a'] = a  # write back