Question

我尝试为Python 3安装scikit-learn。我是按照以下方式安装的：

virtualenv model_env
source  model_env/bin/activate
pip3 install sklearn

结果我收到以下错误消息：

Downloading/unpacking sklearn
  Cannot fetch index base URL https://pypi.python.org/simple/
  Could not find any downloads that satisfy the requirement sklearn
Cleaning up...
No distributions at all found for sklearn

我对pandas包有同样的问题，我已使用以下命令解决了这个问题：

sudo apt-get install python3-pandas

不幸的是，同样的方法对sklearn

不起作用

sudo apt-get install python3-sklearn

ADDED

当我将sklearn替换为scikit-learn时，我遇到了同样的问题：

Downloading/unpacking scikit-learn
  Cannot fetch index base URL https://pypi.python.org/simple/
  Could not find any downloads that satisfy the requirement scikit-learn
Cleaning up...
No distributions at all found for scikit-learn

已添加2

正如我们所推荐的那样，我尝试将pip与-vvv结合使用。请注意，我使用的是pip3而不是pip。这就是我得到的结果：

Downloading/unpacking scikit-learn
  Getting page https://pypi.python.org/simple/scikit-learn/
  Could not fetch URL https://pypi.python.org/simple/scikit-learn/: connection error: HTTPSConnectionPool(host='pypi.python.org', port=443): Max retries exceeded with url: /simple/scikit-learn/ (Caused by <class 'OSError'>: [Errno 101] Network is unreachable)
  Will skip URL https://pypi.python.org/simple/scikit-learn/ when looking for download links for scikit-learn
  Getting page https://pypi.python.org/simple/
  Could not fetch URL https://pypi.python.org/simple/: connection error: HTTPSConnectionPool(host='pypi.python.org', port=443): Max retries exceeded with url: /simple/ (Caused by <class 'OSError'>: [Errno 101] Network is unreachable)
  Will skip URL https://pypi.python.org/simple/ when looking for download links for scikit-learn
  Cannot fetch index base URL https://pypi.python.org/simple/
  URLs to search for versions for scikit-learn:
  * https://pypi.python.org/simple/scikit-learn/
  Getting page https://pypi.python.org/simple/scikit-learn/
  Could not fetch URL https://pypi.python.org/simple/scikit-learn/: connection error: HTTPSConnectionPool(host='pypi.python.org', port=443): Max retries exceeded with url: /simple/scikit-learn/ (Caused by <class 'OSError'>: [Errno 101] Network is unreachable)
  Will skip URL https://pypi.python.org/simple/scikit-learn/ when looking for download links for scikit-learn
  Could not find any downloads that satisfy the requirement scikit-learn
Cleaning up...
  Removing temporary dir /tmp/pip_build_root...
No distributions at all found for scikit-learn
Exception information:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/usr/lib/python3/dist-packages/pip/commands/install.py", line 278, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "/usr/lib/python3/dist-packages/pip/req.py", line 1178, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "/usr/lib/python3/dist-packages/pip/index.py", line 277, in find_requirement
    raise DistributionNotFound('No distributions at all found for %s' % req)
pip.exceptions.DistributionNotFound: No distributions at all found for scikit-learn

Storing debug log for failure in /home/rngorb/.pip/pip.log

Answer 1

尝试使用

pip3 install scikit-learn

Answer 2

首先更新你的点子：

pip3 install --upgrade pip

然后使用arg“--user”安装scikit-learn。不要使用带有pip的sudo，因为它会产生问题：

pip install --user scikit-learn

Answer 3

也许您应该考虑使用Anaconda默认包含这两个软件包，并使用工具来管理enviroments和packages

Answer 4

我可以用这个命令解决它：

py -m pip install --user NAME_OF_THE_LIBRARY

它适用于 - NumPy，SciPy，matplotlib，ipython，jupyter，pandas，sympy，nose和scikit-learn

Answer 5

如果您想要Anaconda套餐的便利性，但pip套餐管理的灵活性和极简主义，我建议您尝试miniconda。

安装miniconda后（记得source ~/.bash_profile或source ~/.bashrc），您可以这样做来设置您的环境：

conda create -n myenv scikit-learn pip python=3

如果你想安装不支持作为conda包的库，这将为你提供一个带有sklearn和pip的conda env。 pip在conda env内部运行。

Answer 6

根据问题answer Python pip error: “Cannot fetch index base URL https://pypi.python.org/simple/”，我会尝试使用easy_install重新安装（和升级）pip

easy_install pip==8.1.2

我尝试重现您的问题，并且在pyenv-3.4创建的虚拟环境中，pip install numpy和pip install scipy之后安装scikit-learn成功。

Answer 7

如果您有多个版本的Python，请确保在安装之前您处于正确的站点包路径。

我的情况就是这样!!!

Answer 8

效果很好。尝试在全局环境（即直接在终端）中安装sklearn。对于Ubuntu 17.04（+最新版本），请尝试-

sudo apt-get install python3-sklearn

类似地，对于熊猫

sudo apt-get install python3-pandas

＆＃34;无法获取索引库URL＆＃34;尝试安装scikit-learn for Python 3时出现错误消息

8 个答案: