基于Spyder创建一个Datloader类,要求用__init__方法加载train-labels.idx1-ubyte文件,用__getitem__方法获得第n个标签,编写__getimg__和__getlabel__方法,同时加载图片和标签
时间: 2023-11-06 18:59:17 浏览: 38
以下是基于Spyder创建的Datloader类的代码:
```python
import struct
import numpy as np
class Datloader:
def __init__(self, file_path):
self.labels = []
with open(file_path, 'rb') as f:
magic_number = struct.unpack('>i', f.read(4))[0]
num_items = struct.unpack('>i', f.read(4))[0]
for i in range(num_items):
label = struct.unpack('>B', f.read(1))[0]
self.labels.append(label)
def __getitem__(self, n):
return self.labels[n]
def __getimg__(self, file_path):
images = []
with open(file_path, 'rb') as f:
magic_number = struct.unpack('>i', f.read(4))[0]
num_items = struct.unpack('>i', f.read(4))[0]
num_rows = struct.unpack('>i', f.read(4))[0]
num_cols = struct.unpack('>i', f.read(4))[0]
for i in range(num_items):
img = np.zeros((num_rows, num_cols))
for row in range(num_rows):
for col in range(num_cols):
pixel_value = struct.unpack('>B', f.read(1))[0]
img[row, col] = pixel_value
images.append(img)
return images
def __getlabel__(self, file_path):
labels = []
with open(file_path, 'rb') as f:
magic_number = struct.unpack('>i', f.read(4))[0]
num_items = struct.unpack('>i', f.read(4))[0]
for i in range(num_items):
label = struct.unpack('>B', f.read(1))[0]
labels.append(label)
return labels
```
这个类实现了从train-labels.idx1-ubyte文件中加载标签,并可以用__getitem__方法获取第n个标签。另外,还实现了__getimg__和__getlabel__方法,可以加载图片和标签。这些方法都是基于idx1格式的文件实现的。如果要加载其他格式的文件,需要根据具体的格式进行相应的修改。
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