Модулем 
pickle как вариант, если я правильно понял:
Запись:
import pickle
# An arbitrary collection of objects supported by pickle.
data = {
    'a': [1, 2.0, 3, 4+6j],
    'b': ("character string", b"byte string"),
    'c': {None, True, False}
}
with open('data.txt', 'wb') as f:
    # Pickle the 'data' dictionary using the highest protocol available.
    pickle.dump(data, f, pickle.HIGHEST_PROTOCOL)
Чтение
import pickle
with open('data.txt', 'rb') as f:
    # The protocol version used is detected automatically, so we do not
    # have to specify it.
    data = pickle.load(f)
print(data)
# {'a': [1, 2.0, 3, (4+6j)], 'b': ('character string', b'byte string'), 'c': {None, True, False}}