val lena logs dex open log 数据结构 desc
- <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 数据结构如上.
完整代码:
- 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 读取 mnist label 数据库
来源: http://www.bubuko.com/infodetail-2097315.html