PythonIntro-picklebinarydata(Python3)

1. importerror no module named cpickle

cPickle module in  Python2  has been replaced by an improved module pickle in Python3. So simply use pickle.

2. pickle.load cause UnicodeDecodeError: 'ascii' codec can't decode byte 0x90 in position 614: ordinal not in range(128)

#### Libraries
# Standard library

# import cPickle
import pickle
import gzip

# Third-party libraries
import numpy as np

def load_data():

    f = gzip.open('../data/mnist.pkl.gz', 'rb')
#    training_data, validation_data, test_data = cPickle.load(f)
    training_data, validation_data, test_data = pickle.load(f, encoding="bytes")
    f.close()
    return (training_data, validation_data, test_data)