<br>[offset] [type]          [value]          [description]
0000     32 bit integer  0x00000803(2051) magic number
0004     32 bit integer  60000            number of items

0008     unsigned byte   ??               label
0009     unsigned byte   ??               label
........
xxxx     unsigned byte   ??               label

Mnist label數據結構如上.

完整代碼:

import struct

filename = ‘/home/xxxx/Downloads/train-labels.idx1-ubyte‘
binFile = open(filename, ‘rb‘)
buf = binFile.read()

index = 0
magic, train_label_num = struct.unpack_from(‘>II‘, buf, index)
print(magic)
print(train_label_num)

index += struct.calcsize(‘>II‘)

train_label_lis=[]

for i in range(train_label_num):
    label_item = int(struct.unpack_from(‘>B‘, buf, index)[0])
    train_label_lis.append(label_item)
    index += struct.calcsize(‘B‘)


print(train_label_lis[0])

python讀取mnist label數據庫