现在不下载了,但是找不到文件报错
为啥还是报错
def _download_20newsgroups(target_dir, cache_path):
"""Download the 20 newsgroups data and stored it as a zipped pickle."""
train_path = os.path.join(target_dir, TRAIN_FOLDER)
test_path = os.path.join(target_dir, TEST_FOLDER)
if not os.path.exists(target_dir):
os.makedirs(target_dir)
logger.info("Downloading dataset from %s (14 MB)", ARCHIVE.url)
# archive_path = _fetch_remote(ARCHIVE, dirname=target_dir)
archive_path = r'C:\Users\BigFish\scikit_learn_data\20news-bydate.tar.gz'
logger.debug("Decompressing %s", archive_path)
tarfile.open(archive_path, "r:gz").extractall(path=target_dir)
os.remove(archive_path)
# Store a zipped pickle
cache = dict(
train=load_files(train_path, encoding="latin1"),
test=load_files(test_path, encoding="latin1"),
)
compressed_content = codecs.encode(pickle.dumps(cache), "zlib_codec")
with open(cache_path, "wb") as f:
f.write(compressed_content)
shutil.rmtree(target_dir)
return cache
【以下回答由 GPT 生成】
问题的关键在于如何使用sklearn加载本地下载的数据集。根据提供的代码和问题描述,可以看出代码中的下载和解压缩部分已经完成,并将数据存储为pickle文件,接下来将给出加载本地数据集的代码解决方案。
首先,确保已经安装了scikit-learn
库。如果没有安装,可以通过以下命令来安装:
pip install -U scikit-learn
接下来,可以使用pickle
库来加载pickle文件中的数据。在给出具体代码之前,需要执行以下几个步骤:
import pickle
from sklearn.datasets import load_files
下面是加载pickle文件中的数据的代码解决方案:
def load_data_from_pickle(cache_path):
with open(cache_path, "rb") as f:
compressed_content = f.read()
cache = pickle.loads(compressed_content)
return cache["train"], cache["test"]
调用该函数并获取训练和测试数据集:
train_data, test_data = load_data_from_pickle(cache_path)
至此,您可以使用train_data
和test_data
进行数据处理和模型训练。
以下是整个解决方案的总结代码:
import os
import tarfile
import pickle
import codecs
import shutil
import logging
from sklearn.datasets import load_files
def _download_20newsgroups(target_dir, cache_path):
"""下载20个新闻组数据并将其存储为压缩的pickle文件。"""
train_path = os.path.join(target_dir, "train")
test_path = os.path.join(target_dir, "test")
if not os.path.exists(target_dir):
os.makedirs(target_dir)
logger = logging.getLogger(__name__)
logger.info("正在从%s下载数据集(14 MB)", ARCHIVE.url)
archive_path = r'C:\Users\BigFish\scikit_learn_data\20news-bydate.tar.gz'
logger.debug("正在解压缩%s", archive_path)
tarfile.open(archive_path, "r:gz").extractall(path=target_dir)
os.remove(archive_path)
# 存储为压缩的pickle文件
cache = dict(
train=load_files(train_path, encoding="latin1"),
test=load_files(test_path, encoding="latin1"),
)
compressed_content = codecs.encode(pickle.dumps(cache), "zlib_codec")
with open(cache_path, "wb") as f:
f.write(compressed_content)
shutil.rmtree(target_dir)
return cache
def load_data_from_pickle(cache_path):
with open(cache_path, "rb") as f:
compressed_content = f.read()
cache = pickle.loads(compressed_content)
return cache["train"], cache["test"]
# 假设cache_path是pickle文件路径
train_data, test_data = load_data_from_pickle(cache_path)
希望以上解决方案能对您有帮助。如果还有任何问题,请随时提问。
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