python3，load python2创建的pickle，报UnicodeDecodeError错误

形如
UnicodeDecodeError: 'ascii' codec can't decode byte 0x9a in position 0: ordinal not in range(128)

解决方法：参考

Pickle incompatibility of numpy arrays between Python 2 and 3 - Stack Overflow

import pickle
import gzip
import numpy

with open('mnist.pkl', 'rb') as f:
    u = pickle._Unpickler(f)
    u.encoding = 'latin1'
    p = u.load()
    print(p)

然后就可以正常读出结果了