如何为Python 3安装scikit-learn？

我尝试安装scikit学习Python的3。我这样做以下列方式：如何为Python 3安装scikit-learn？

virtualenv model_env 
source model_env/bin/activate 
pip3 install sklearn

结果我得到了以下错误消息：

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

我有同样的问题

sudo apt-get install python3-pandas

不幸的是，同样的方法不适合的工作：与pandas包，我已经使用以下命令解决它sklearn

sudo apt-get install python3-sklearn

ADDED

当我通过scikit-learn更换sklearn，我有同样的问题：

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

加入2-

因为它已被推荐，我尝试在combinati中使用点子与-vvv。请注意，我使用pip3而不是pip。这是我得到的结果是：

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

来源

2016-08-04 Roman

须藤安装PIP画中画-U须藤 PIP安装-U scikit学习 –

包名scikit学习 – Luca

@Luca，'scikit-learn'不工作，以及（见我的问题的更新）。 – Roman

使用

pip3 install scikit-learn

来源

2016-08-04 14:29:41

它没有帮助，我仍然有同样的问题（相同的错误信息）。 – Roman

也许你应该考虑使用Anaconda它默认包括两个包，使您的生活更轻松的工具来管理enviroments尝试和packages

来源

2016-08-04 14:46:25

@Roman我也发现使用Anaconda是安装这些软件包的最简单方法。 [Here]（https://eatsleepdata.com/blogs/machine-learning/how-to-install-python-machine-learning-packages-using-anaconda）是使用Anaconda安装scikit-learn的一个例子。 –

如果你想要Anaconda包的便利性，但是pip包管理的灵活性和极简主义，我建议你试试miniconda。

一旦你安装miniconda（记住要source ~/.bash_profile或source ~/.bashrc），你可以做到这一点，以设置您的环境：

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

这将让你在情况sklearn和PIP要安装库一个畅达ENV作为conda软件包不支持。点子在conda env内运行。

来源

2016-08-04 23:45:36 zemekeneng

在此基础上answer的问题Python pip error: “Cannot fetch index base URL https://pypi.python.org/simple/”我会尝试重新安装（升级）与easy_install的

easy_install pip==8.1.2

我试图PIP重现你的问题，并安装scikit学习pip install numpy和pip install scipy后，在一个虚拟的成功由pyenv-3.4创建的环境。

来源

2016-08-05 13:20:49

首先更新您的点子：

pip3 install --upgrade pip

然后安装与ARG “--user” scikit学习。不要使用sudo与PIP因为它会给问题：

pip install --user scikit-learn

来源

2017-08-03 23:01:46

，如果你有Python的多个版本，请确保你是在正确站点包路径安装之前。

这是我的情况！

来源

2018-02-06 22:47:55

如何为Python 3安装scikit-learn？

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