尝试为 Python 3 安装 scikit-learn 时出现“无法获取索引基 URL”错误消息
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"Cannot fetch index base URL" error message when attempting to install scikit-learn for Python 3
提问by Roman
I try to install scikit-learn for Python 3. I do it in the following way:
我尝试为 Python 3 安装 scikit-learn。我按以下方式进行：
virtualenv model_env
source model_env/bin/activate
pip3 install sklearn
As a result I get the following error message:
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
I had the same problem with pandaspackage and I have resolved it by using the following command:
我在pandas包上遇到了同样的问题，我已经使用以下命令解决了它：
sudo apt-get install python3-pandas
Unfortunately, the same approach does not work for the sklearn
不幸的是，同样的方法不适用于 sklearn
sudo apt-get install python3-sklearn
ADDED
添加
When I replace sklearnby scikit-learn, I have the same problem:
当我更换sklearn的scikit-learn，我也有同样的问题：
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
ADDED 2
添加 2
As it has been recommended, I have try to use pip in combination with -vvv. Note that I use pip3instead of pip. This is what I get as the result:
正如推荐的那样，我尝试将 pip 与-vvv. 请注意，我使用pip3代替pip. 这是我得到的结果：
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
回答by Naveen Arun
Try using
尝试使用
pip3 install scikit-learn
回答by user8414391
First update your pip:
首先更新你的点子：
pip3 install --upgrade pip
Then install scikit-learn with arg "--user". Don't use sudo with pip as it will give problems:
然后使用参数“--user”安装 scikit-learn。不要将 sudo 与 pip 一起使用，因为它会产生问题：
pip install --user scikit-learn
回答by Ederson
I could solve it with this command:
我可以用这个命令解决它：
py -m pip install --user NAME_OF_THE_LIBRARY
It worked with- NumPy, SciPy, matplotlib, ipython, jupyter, pandas, sympy, nose and scikit-learn
它适用于 - NumPy、SciPy、matplotlib、ipython、jupyter、pandas、sympy、nose 和 scikit-learn
回答by David de la Iglesia
回答by zemekeneng
If you want the convenience of Anaconda packages but the flexibility and minimalism of pippackage management, I suggest you try miniconda.
如果你想要 Anaconda 包的便利，但想要pip包管理的灵活性和极简主义，我建议你尝试miniconda。
Once you install miniconda (remembering to source ~/.bash_profileor source ~/.bashrc), you can do this to setup your environment:
一旦你安装了 miniconda（记住source ~/.bash_profile或source ~/.bashrc），你可以这样做来设置你的环境：
conda create -n myenv scikit-learn pip python=3
This will get you a conda env with sklearn and pip in case you want to install libraries that are not supported as a conda package. The pip runs inside the conda env.
这将为您提供一个带有 sklearn 和 pip 的 conda env，以防您想安装不支持作为 conda 包的库。pip 在 conda 环境中运行。
回答by J.J. Hakala
Based on this answerfor question Python pip error: “Cannot fetch index base URL https://pypi.python.org/simple/”I would try to reinstall (and upgrade) pip with easy_install
基于问题Python pip error: “Cannot fetch index base URL https://pypi.python.org/simple/”的这个答案，我会尝试使用 easy_install 重新安装（和升级）pip
easy_install pip==8.1.2
I tried to reproduce your problem, and installing scikit-learn succeeded after pip install numpyand pip install scipyin a virtual environment created by pyenv-3.4.
我试图重现您的问题，并且在 pyenv-3.4 创建的虚拟环境中pip install numpy和之后安装 scikit-learn 成功pip install scipy。
回答by Jishan Shaikh
It works perfectly fine. Try to install sklearn in the global environment i.e. in the terminal directly. For Ubuntu 17.04 (+ latest versions) try-
它工作得很好。尝试在全局环境中安装 sklearn，即直接在终端中。对于 Ubuntu 17.04（+ 最新版本），请尝试-
sudo apt-get install python3-sklearn
sudo apt-get install python3-sklearn
Similarly, for pandas
同样，对于熊猫
sudo apt-get install python3-pandas
sudo apt-get install python3-pandas
回答by Kadir Erturk
if you have multiple version of Python, make sure that you are at the correct site-package path before install.
如果您有多个版本的 Python，请确保您在安装前位于正确的站点包路径。
It was the case for me!!!
我就是这种情况！！！
