在CNTK中手动读取Minibacth内容

import cntk as C
import numpy as np

# 定义数据源路径
data_path = 'path_to_data_file.txt'

# 定义数据转换函数
def transform(data):
    # 在这里对数据进行转换和预处理
    return data

# 创建MinibatchSource对象
minibatch_source = C.io.MinibatchSource(C.io.CTFDeserializer(data_path, C.io.StreamDefs(
    features=C.io.StreamDef(field='features', shape=feature_shape, is_sparse=False),
    labels=C.io.StreamDef(field='labels', shape=label_shape, is_sparse=False)
)), randomize=False)

# 设置数据转换函数
minibatch_source = minibatch_source['features'].alias('features'), minibatch_source['labels'].alias('labels')

# 定义Minibatch大小
minibatch_size = 64

# 创建Minibatch读取器
minibatch_reader = minibatch_source.next_minibatch(minibatch_size)

# 从Minibatch读取器中获取数据
features = minibatch_reader[minibatch_source['features']]
labels = minibatch_reader[minibatch_source['labels']]