serialization.py

import pickle

a_dict = dict()
a_dict['EUR'] = {'code':'Euro', 'symbol': '€'}
a_dict['GBP'] = {'code':'Pounds sterling', 'symbol': '£'}
a_dict['USD'] = {'code':'US dollar', 'symbol': '$'}
a_dict['JPY'] = {'code':'Japanese yen', 'symbol': '¥'}

a_list = ['a', 123, [10, 100, 1000]]

with open('multidata.pckl', 'wb') as file_out:
    pickle.dump(a_dict, file_out)
    pickle.dump(a_list, file_out)

import pickle

with open('multidata.pckl', 'rb') as file_in:
    data1 = pickle.load(file_in)
    data2 = pickle.load(file_in)

print(type(data1))
print(data1)
print(type(data2))
print(data2)



#=============================#

import pickle

a_list = ['a', 123, [10, 100, 1000]]
bytes = pickle.dumps(a_list)
print('Intermediate object type, used to preserve data:', type(bytes),bytes)

# now pass 'bytes' to appropriate driver

# therefore when you receive a bytes object from an appropriate driver you can deserialize it
b_list = pickle.loads(bytes)
print('A type of deserialized object:', type(b_list),b_list)
print('Contents:', b_list)